Repair 7

Fuel pump failure will stop a car in its tracks. An engine sputtering and shutting off is the most notable sign of pump failure. If there is gas in your tank and your car sputters and shuts down you may need to replace your fuel pump. The fuel pump is located inside your gas tank and it can be replaced within two to five hours with all of the proper tools.

Instructions

Relieve Fuel Pressure

1

Remove the gas cap to relieve any pressure in the gas tank.

2

Disconnect the wiring for the fuel pump assembly that is located behind the fuel filter hose, if you have a model with port fuel injection. The fuel filter hose is near the fuel filter just in front of the back tire on the passengers side.

3

Run the engine until it uses all of the remaining fuel and stops running.

4

Disconnect the negative battery terminal.

Remove Fuel Tank

5

Siphon gas out of your tank or use the fuel up if it is more than one-eighth full. Use a siphon pump to siphon fuel out of your vehicle. Insert one hose end in to the gas tank and the other in to a fuel-safe container. Pump the fuel out of the tank into the container.

6

Engage the emergency brake and block the front wheels. Raise the back of your vehicle up with a jack and place it on jack stands. Remove the jack.

7

Disconnect the wiring for the fuel pump assembly if you have not already done so. Disconnect the vapor return hose, the filler neck, and the vent tubes. Disconnect the fuel feed hose, and the fuel-return hose as well.

8

Support the fuel tank with the jack and remove both restraining straps. Lower the tank until you can access the wires and remove the ground strap and the wire.

9

Lower the fuel tank to the ground and bring it out from under your car.

Remove the Fuel Pump

10

Using a punch and hammer, gently tap the inner ring counter clockwise until the inner cams are free.

11

Pull the fuel pump out of the tank. Make sure not to bump it on anything because the fuel level float and the fuel sending unit are delicate and even a small bump will render the readings inaccurate.

12

Check the o-ring on top of the fuel pump and the filter on the bottom of it. If the o-ring is cracked or dry, replace it. If the filter cannot be cleaned, it must be replaced.

The catalytic converter regulates and reduces pollutants within the vehicles exhaust. Vehicles are required by law to have them, so you need to replace them if they are no longer working. On a current Chevy Silverado, the catalytic converters are welded to the front exhaust pipe assembly, so replacing a catalytic converter means replacing the entire front exhaust pipe assembly. This process can differ on older models (specifically ones made prior to 2007), so check with your mechanic.

Instructions

1

Raise the truck and support it on jack stands.

2

Disconnect the electrical connectors for the converters upstream and downstream oxygen sensors. Unscrew and remove the sensors using an oxygen sensor socket.

3

Unscrew and remove the three nuts that are on the upper-left and right flanges connecting the front exhaust pipe assembly to the exhaust manifolds flanges using a wrench. Remove the nuts for the rear flange of the front exhaust and remove the front exhaust pipe.

4

Install new flange gaskets onto the three mounting flanges of the replacement exhaust pipe (which will include the replacement converters).

5

Coat the threads on the mounting nuts and bolts with anti-seize compound. This includes the threads on the oxygen sensors.

6

Install the exhaust pipe system and securely tighten the nuts and bolts for the three flanges connecting it to the manifold and the rest of the exhaust system.

7

Connect the upstream and downstream oxygen sensors to the front exhaust pipe using the same socket as before.

The common engine in the Chevy Cavalier is the 2.2 liter four cylinder. A few models have a 2.4 liter engine. Both engines use two oxygen sensors. Oxygen sensors read the amount of air and burned fuels in the exhaust system and transmit that data to the engine management computer through voltage. The computer then adjusts the ratio of air and fuel to lower the pollution in exhaust. When the sensor fails in the Cavalier, the computer ignores it and makes its own adjustments, which can cause more pollution, less gas mileage or both.

Instructions

1

Locate the oxygen sensor that needs replacing. If youre replacing the front one (upstream), you can access it in the engine compartment by lifting the hood. If you are replacing the rear sensor (downstream), youll need to lift the Cavaliers front end with the floor jack and support it safely and securely onto the jack stands. The front sensor is located in the front lower center of the engine and screwed into the header pipe. The rear sensor is located in the exhaust pipe near the catalytic converter. Put on safety glasses if you crawl under the Cavalier.

2

Locate the wire harness to the oxygen sensor. Use the flathead screwdriver to press in on the clip lock of the plug on the oxygen sensor wire and separate it from the wire harness.

3

Spray a liberal amount of penetrating oil on the threads of the oxygen sensor and allow the oil to soak in.

4

Place the box end wrench or socket onto the oxygen sensor and turn it counterclockwise to unthread it from the exhaust pipe. Remove the sensor.

5

Thread the new sensor into the oxygen sensor porthole in the exhaust pipe and tighten using the wrench or socket and a ratchet. Do not overtighten. Make sure its snug, but it is easy to strip the threads on the oxygen sensor so be caul.

6

Plug the oxygen sensor wire back into the wire harness and secure the wire so it does not dangle.

7

Remove the tools and either lower the vehicle or close the hood.

The Chevrolet Silverado is a full-size pickup truck that has been in production since 1998. It is available with several types of V-6 and V-8 engines, which have a cylinder head on each side of the engine. The procedure for replacing the cylinder head gasket varies slightly, depending on which cylinder head you must remove. These procedures are generally the same for the 4.3-liter, 4.8-liter and 5.3-liter engines in the 2000 Chevrolet pickup.

Instructions

1

Disconnect the negative battery cable using the socket wrench. Detach the bleed pipe for the coolant from the right cylinder head. Disconnect the intake manifold and remove the push rods from the engine. Remove the exhaust manifolds from the engine.

2

Remove the mounting bolts that attach the alternator bracket to the left cylinder head with a socket wrench. Disconnect the mounting bolt for the alternator bracket that is behind the power steering pump, and push the bracket aside with the alternator still attached.

3

Disconnect the bolt that attaches the oil level tube to the right cylinder head with a socket wrench. Detach the oil level tube from the right cylinder head, and unscrew the spark plugs from the cylinder head.

4

Remove the mounting bolts for the cylinder head with a socket wrench, and discard the 11-mm mounting bolts. Lift the cylinder head from the engine and discard the cylinder head gasket.

5

Clean the bolt holes on the engine block with GM spray cleaner, part number 12346139, and blow the holes clear with compressed air. Remove the thread-locking material from the 8-mm mounting bolts with the GM driver tool, part number J 42385-107. Place the new gasket for the cylinder head over the locating pins on the engine block, then install the cylinder head over the locating pins.

6

Fasten new 11-mm mounting bolts to the cylinder head by hand. Apply a 0.2-inch bead of GM thread lock compound, part number 12345382, to the threads of the 8-mm bolts, and fasten them by hand.

7

Tighten the 11-mm bolts to 22 foot-pounds with a torque wrench on the first pass. Tighten the 11-mm bolts an additional 90 degrees on the second pass, then tighten them another 70 degrees on the third pass. Tighten the 8-mm bolts to 22 foot-pounds, beginning with the center bolt. Work your way outward on the 8-mm bolts, alternating from side to side.

8

Connect the oil level tube to the right cylinder head with a socket wrench. Mount the bracket for the alternator and tighten its bolts to 37 foot-pounds with a torque wrench, including the mounting bolt below the power steering pump. Connect the exhaust manifolds to the engine, and install the push rods. Attach the bleed pipe for the coolant to the right cylinder head, and connect the negative battery cable.

The 1998 Chevy Silverado is built on the C/K General Motors truck platform. It is available in a number of cab configurations as well as in two-wheel drive, and four-wheel drive. All Silverados use center links to connect the steering knuckles on the front wheels. The center link uses tie rods with ball joints to connect to the steering knuckles so that it can flex with the truck. Over time the center link can break and need to be replaced.

Instructions

1

Park the truck on a level surface, in a location thats free of traffic where you have plenty of room to work around the front end. Place the truck in Park and pull the emergency brake before turning the truck off. Disconnect the black wire from the battery. Jack the front of the truck up with the car jack and lower the vehicle onto jack stands

2

Locate the center link that connects the two front steering knuckles. Use a wrench to loosen the tie rod on the right first. Unscrew the bottom cup joint by hand. Then unscrew the bottom cup joint from the left side of the center link. Pull the center link out from under the truck and use a rubber mallet to knock the cups off the balls on each end of the center link.

3

Knock the cup joints on to the balls on the new center link with the rubber mallet. Then lift the right side of the center link up and screw the right cup joint back into the tie rod by hand. Then, lift the left side and screw in the left cup joint by hand. Once the new center link is supported, use the wrench to tighten the tie rod cup joints.

4

Use the jack to lower the truck off of the jack stands. Have a friend watch the front wheels as you turn the steering wheel to make sure they both turn at the same rate. If not, then retighten the tie rods with a wrench.

The fourth generation of the 1500 series pickup truck appeared in 1988 and was manufactured until 2000 by Chevrolet. There were a total of eight different versions and cab variations of the 1500. They were powered by reliable V8 engines that required periodic service if parts like the intake manifold gasket would fail.

Instructions

Removal Procedure

1

Mark the relationship of the distributor housing and rotor for proper reassembly. Remove the distributor. Unplug the upper radiator hose at the thermostat housing. Remove the heater hose at the lower intake manifold. Remove the EGR valve and the coolant bypass hose.

2

Pull out the fuel supply and return lines from the rear part of the intake manifold. Unplug the wiring harness and brackets. Remove the throttle cable and bracket. Remove the cruise control cable.

3

Take out the transmission oil level indicator tube. Remove the EGR inlet tube, clamp and bolt. Remove the PCV valve and vacuum hoses. Unscrew the air conditioning compressor. Loosen the A/C compressor mounting bracket and slide forward, but do not remove it. Lay the A/C compressor out of the way. Do not kink the air conditioning lines.

4

Remove the power brake vacuum tube and the rocker arm cover. Remove the generator rear bracket bolt. Take out the intake manifold. Remove the old pieces of gasket from the gasket surfaces. Clean the excessive carbon buildup from inside the exhaust passages and the scale and deposits from the coolant passages. Inspect the manifold for cracks, broken flanges and gasket surface damage.

Installation Procedure

5

Position the new gaskets to the cylinder head with the port blocking plates facing the rear of the engine and "This Side Up" facing up. Install the lower intake manifold on the engine. Apply sealer to the lower intake manifold bolts. Put in the lower intake manifold bolts back in place. Tighten the bolts in three steps. In the first step apply 27 inch pounds of torque. In the second apply 106 inch pound of torque and in the last step tighten the bolts applying 11 foot pounds of torque.

6

Plug in the wiring harness connectors and brackets. Connect the upper radiator hose at the thermostat housing. Install the heater hose at the lower intake manifold. Connect the coolant bypass hose.

7

Install the EGR valve and the valve rocker arm cover. Connect the fuel supply and return lines at the rear of the intake manifold. Plug in the wiring harness and brackets. Install the cruise control cable (if equipped).

8

Install the throttle cable and bracket. Put back the transmission oil level indicator tube. Install the EGR inlet tube, clamp, and bolt. Connect the PCV valve and vacuum hoses. Install the power brake vacuum tube. Install the generator and the bracket bolt (if needed). Install the air conditioning compressor and bracket. Refer to Heating and Air Conditioning. Connect the distributor. Note the relationship of the distributor housing and rotor made at disassembly.

Modern vehicles come with a computer system that helps regulate the way the car runs as well as inform the driver when problems arise. A 2002 Chevy Tahoe uses a computer that can be scanned to indicate if there is a problem with the car. The ability to identify a problem quickly, can save both time and money and enable the driver to complete a repair efficiently.

Instructions

1

Remove the cover from the fuse box. This box is located below the steering column on the drivers side of the vehicle.

2

Plug the diagnostic scanning tool into the 16-pin data link connector (DLC) outlet provided on the left side of the fuse box. Snap it firmly into place but do not force it. If it does not fit correctly the first time, remove and reposition the scanner so that it plugs in correctly.

3

Turn the key in the ignition to "On", but do not start the car. Turn on the scanner and wait for the diagnostic check to be completed. Unplug and remove the scanner and replace the fuse cover.

4

Access the Diagnostic Trouble Codes (DTC) on the scanner using the directions on the diagnostic scanner. Retrieve the stored code. Match this stored code to that in the owners manual to determine the Tahoes computer reading.

5

Repair or replace the parts needed to ensure the proper running of the Tahoe.

The Chevrolet Uplander is a minivan introduced in 2005 as a replacement for the Venture and Astro. As with any vehicle, the Uplanders headlights provide very important safety components to the vehicle. If you drive your Chevy Uplander with faulty headlights, your road division can be severely diminished and other vehicles will have difficulty seeing you on the road. The headlamp replacement process takes a few minutes and requires a screwdriver and replacement bulb.

Instructions

1

Park the vehicle and turn off the engine. Open and secure the hood of the Uplander and put on the clean gloves.

2

Remove the headlamp retainer pin by rotating it toward the headlamp assembly and pulling it out. Use the screwdriver to remove the screw from the top of the headlamp assembly.

3

Pull the assembly out of the vehicle and disconnect the socket wiring harness connector from the rear of the assembly.

4

Rotate the bulb socket counterclockwise to remove it from the assembly.

5

Disconnect the bulb socket wiring harness from the old bulb by pulling it off. Place the wiring harness onto the replacement bulb.

6

Reinstall and secure the bulb socket by inserting it into the bulb assembly and rotating it clockwise.

7

Reconnect the socket wiring harness connector to the rear of the assembly and place it back into the Uplander.

8

Reattach the screw on top of the headlamp assembly and reattach the retainer pin. Close the hood.

There are a number of different fluids that are used in a General Motors or Chevrolet 6.5-liter diesel engine to keep it running smoothly and operating properly. Without the proper fluids, the trucks engine can be damaged by heat and friction that are generated as the engine runs. It is important to use the proper fluids in your diesel truck and keep the right amount of fluids in the engine at all times.

Oil

Engine oil is required for all gasoline and diesel engines. Oil provides the lubrication necessary to minimize friction between internal components. The 2011 Chevrolet Diesel Truck owners manual insert states that Chevrolet diesel engines need to use engine oil that is designated as API CJ-4 and has a viscosity of SAE 15W-40, unless you are in extremely cold temperatures, where SAE 5W-40 can be used to improve cold starting. Chevrolet states that you should not use 10W-30, 10W-40 or 20W-50 oils in your 6.5 diesel engine. Oil should be changed every 3,000 miles.

Oil Flushes and Additives

Chevrolet states that vehicle owners should not add any kind of additional fluid to the recommended engine oil of their diesel trucks. Chevrolet does not recommend using oil additives or engine oil system flushes. These treatments may void your vehicles warranty and cause damage.

Coolant

The 6.5-liter diesel should operate using a 50/50 mixture of DEX-COOL coolant and clean, drinking-quality water in the radiator and cooling system. The coolants purpose in the engine is to prevent overheating and extreme engine temperatures.

Other Fluids

Your 6.5-liter diesel engine and its various components rely on a number of different fluids to continue operating properly. These include DEXRON-VI automatic transmission fluid for the transmission and transfer case, GM-brand power steering and diesel exhaust fluid, and DOT-3 hydraulic brake fluid.

The anti-lock braking system (ABS) in your Chevy light pickup truck helps to prevent your wheels from locking up when you slam on the brakes. This gives you some control during an emergency braking maneuver, regardless of the road conditions. Sometimes this system may malfunction, and you will know this by the ABS light showing up on your instrument panel. You can troubleshoot the problem yourself before doing the repairs yourself or taking it to a mechanic.

Instructions

1

Locate the fuse panel cover under the steering column on the dashboard. Open the cover by pulling down on it from the top.

2

Look for the fuse puller inside the fuse panel and remove it. Read the diagram on the bottom part of the fuse panel cover to locate the ABS fuse. Use the fuse puller to remove this fuse.

3

Examine the fuse to see if it has blown. You can tell if it has blown by looking at the wire inside the fuse which will be severed. If this is the case, replace it with a new fuse of the same amperage.

4

Insert the key into the ignition and start the engine. If the ABS light stays lit on the instrument panel, then you probably have a malfunction in the ABS. Have the vehicle towed to a qualified mechanic or do the repairs yourself if you know how. Do not drive the vehicle until it has been repaired.

First introduced in 1961 as a 1962 model, the Chevrolet Nova is best remembered as one of the more dominant and beloved vehicles of the muscle-car era that stretched from the early 1960s to the mid-1970s. However, its performance ratings began to fade after the gas crisis of the early 1970s, as was the case with most sports cars of the time. Chevy phased out the Nova after 1979, but briefly resurrected it from 1985 to 1988 as a front-wheel-drive subcompact that could hardly be recognized as having any relation to its predecessor. The specs provided below apply to all trims of the 1988 Chevy Nova but should not be applied to Novas from other model years, as alignment specs tend to change from year to year.

Caster

Caster is the angle that the steering axis of a wheel is tilted when viewed from the side of a vehicle, with zero being a vertical line from the ground through the center of the wheel. The ideal caster angle for the front end of the 1988 Chevy Nova is +0.88 degrees, but it can range by 0.75 degrees in either direction, with a cross tolerance of 0.5 degrees. The caster is not adjustable on the rear end of the 1988 Nova.

Camber

Camber is the angle a wheel tilts when viewed from the front of the vehicle. If the top of the wheel tilts in, the wheel has a negative camber. If the top of the wheel tilts out, the wheel has a positive camber. The ideal setting for the camber angle on the front end of the 1988 Nova is -0.25 degrees, but it can range by 0.5 degrees in either direction, with a cross tolerance of 0.5 degrees. The ideal setting for the camber on the rear end is -0.52 degrees, but it can range by 0.5 degrees in either direction.

Toe-in

Toe is the measurement of the angle of the wheels in relation to the centerline of the vehicle. If the front of a wheel is angled slightly inward toward the vehicles centerline, then it has toe-in. Most vehicles are designed to have slight toe-in, and the measurements for it are given in positive degrees or inches. Negative toe settings suggest toe-out, in which the front of the wheel points slightly outward, away from the vehicles centerline. The ideal setting for the toe-in on the front end of the 1988 Chevy Nova is +0.08 degrees, but it can range by 0.08 degrees in either direction. The ideal setting for the toe-in on the rear end is +0.31 degrees, but it can range by 0.16 degrees in either direction.

An internal combustion engine needs four essential things to run. They are: air, fuel, compression and spark. Those four things must work together in perfect harmony or timing. When timing a small block Chevy, we really just change the specific time at which the spark plug will create a spark and cause an explosion in reference to the position of the piston when it is near top dead center in the cylinder.

Instructions

1

Grind the electrode off the bottom of an old spark plug, dont damage the threads. Place the spark plug in a vise and hammer a punch through the spark plug to remove the porcelain. Cut the head off a 3/8 inch by 2-inch bolt with a hack saw. Grind the bolts shaft round and smooth where the head was removed. Insert the bolt into the spark plug so the rounded shaft protrudes out of the threaded end of the now hollow spark plug about 1 1/2 inches. Weld the bolt to the spark plug on the opposite side of the threads. Allow this plug stop to cool.

2

Remove the negative battery terminal from the battery of the vehicle. Remove all the spark plugs from the small block Chevy engine. Label the spark plug wires to keep them in order for easy replacement.

3

Clean the harmonic balancer so the zero degree line can be seen. Use a wire brush if needed. Insert the special modified spark plug into the number one cylinder of the engine. The number one cylinder is the cylinder closest to the radiator on the drivers side of the vehicle.

4

Rotate the engine very slowly and gently by hand until the piston comes up softly against the plug stop. Make a prick punch mark that aligns perfectly with the zero mark on the timing tab. Rotate the engine in the opposite direction very slowly and gently by hand until the piston comes up softly against the plug stop. Again make a prick punch mark that aligns perfectly with the zero mark on the timing tab. Immediately remove the plug stop.

5

Measure the exact distance between the two prick punch marks and divide that measurement by two. The true top dead center is exactly half the distance between the two punch marks and there should be a line labeled with zero degrees on the balancer, if the balancer is not damaged. If the original zero line does not fall exactly halfway between the punch marks, scribe a new line using a hacksaw blade. Use this new and precise line to time the engine.

6

Reinstall all the spark plugs and reattach all the spark plug wires. Reattach the negative battery terminal to the battery. Slightly loosen the distributor hold-down bolt located at the base of the distributor shaft. Remove the vacuum line from the distributors vacuum advance and plug the line with a small bolt.

7

Set the knob on the timing light to the desired timing degrees according to the specifications for the vehicle. Also, adjust the engines idle speed to the desired specifications for the vehicle, using the digital readout on the timing light. Clamp the timing lights pickup clamp to the number one spark plug wire. Clamp the red power clamp to the positive terminal of the battery and the black ground clamp to the negative terminal.

8

Start the vehicle. Aim the timing light at the harmonic balancer. With the engine running, align the top dead center mark on the balancer with the corresponding mark on the timing tab. Rotate the distributor in one direction or the other to align the marks as needed. Tighten the distributor hold-down bolt when the marks align perfectly. Recheck the timing to be sure it did not move while tightening the distributor. If it moved, repeat the timing procedure until the marks align and the distributor is tight.

9

Reset the idle speed and remove the timing light. Reconnect the vacuum line to the distributor the timing should be set.

Chevrolet applied the S-10 prefix to two different vehicles starting in the 1980s: the Chevy S-10 Blazer SUV and the Chevy S-10 pickup truck. The S-10 prefix is most synonymous with the pickup truck, which sported the S-10 brand from 1982 until it was discontinued in 2004 and was often referred to simply as the S-10.

General Alignment Information of the Chevy S-10

The 2004 model year is the last year for which S-10 alignment specs are available, and the 2004 specs only apply to S-10s produced that year. When adjusting the alignment of a vehicle, it is absolutely necessary to ensure that the proper alignment specs are used not just for a particular model but also for the appropriate year. For instance, the alignment specs for a 1987 S-10 differ substantially from those for a 2004 S-10. In some instances, alignment specs vary from trim to trim of a particular vehicle in a given model year, and they can even vary based on optional suspension packages. The rear alignment is not adjustable on any trim of the 2004 S-10. All two-wheel-drive and four-wheel-drive trims of the 2004 Chevrolet S-10 shared the same alignment specs for the front end, but it is imperative to consult an owners manual, repair manual or certified mechanic to make certain the correct specs are used.

Caster

The caster angle on the front left wheel of the 2004 S-10 can range from +1.8 degrees to +3.8 degrees, with the ideal setting being +2.8 degrees, with a cross tolerance of +0.5 degrees. The caster angle on the right front wheel can range from +2.3 degrees to +4.3 degrees, with the ideal setting being +3.3 degrees, with a cross tolerance of +0.5 degrees. The difference in the two settings is intended to compensate for public roads being crowned at a slight downward slope toward the outside of the lane to facilitate drainage.

Camber

The camber angle on the front end of the 2004 S-10 can range from -1.0 degrees to +1.0 degrees, with zero being the ideal setting, with a cross tolerance of +0.5 degrees.

Toe-in

The toe-in on the front end of the 2004 S-10 can range from -0.1 degrees to +0.3 degrees. The ideal setting is +0.1 degrees.

There are commonly two oxygen sensors in the 4.3 liter engine exhaust system on a Chevy truck. One is the "upstream" sensor located on the drivers side Y-pipe near the manifold and the other "downstream" sensor which is located midway down the passenger side near the catalytic converter. Buying a direct-fit replacement sensor would be strongly advised. Its not much more expensive and it will save you time and effort struggling to rewire the universal after-market sensors.

Instructions

How to Install an Oxygen Sensor in 4.3L Chevy Truck

1

Drive the Chevy truck up onto the car ramps on a level surface and place it in gear or park. Turn off the engine and apply the parking brake. Place a wheel chock behind one of the rear wheels.

2

Grab your tools, put on the safety glasses, and crawl underneath the truck on a creeper if you have one.

3

Locate the sensor you are changing. The front one is located on the drivers side up near the manifold and screwed into the Y-pipe. The rear one is located on the passenger side, down just before the catalytic converter.

4

Follow the oxygen sensor wire to the plug outlet. Unplug the sensor wire from the harness plug. Press in on the clip lock with the screwdriver and separate the plugs.

5

Place the oxygen sensor wire into the slot on the side of the oxygen sensor socket and place the ratchet on the end of the socket. Try to remove the oxygen sensor. If it is stubbornly stuck, remove the socket and ratchet and light the torch. Heat the pipe area around the sensor up, but do not heat the sensor as well. Once the pipe area is good and hot (cherry red) remove the sensor. If you had to use the torch to extract the sensor, allow the pipe area to cool down before proceeding.

6

Screw the new sensor in by hand. You will note that the new sensor has a light coating of anti-seize lubricant on it. Do not wipe this off. It will help for future removal and replacement. Tighten snugly with the ratchet and socket, but do not overtighten the sensor. You do not want to strip the threads of the sensor.

7

Plug the sensor back into the harness plug. Remove the tools and crawl out from under the truck.

8

Remove the wheel chock, release the parking brake, and drive it down off the ramps.

You can read the diagnostic codes on your 95 Chevy Lumina V6 using an OBD I scan tool. This small computerized device is used to read the codes and reset the computer after repairs have been made. It can be purchased from most auto parts stores. Trouble codes are stored by the On-Board Diagnostics (OBD) computer to help you troubleshoot malfunctions within the vehicle. Some codes pertain to the servicing needs of the Chevy.

Instructions

1

Locate the fuse panel cover near the steering column and open it by pulling downwards on it with your fingers. Find the port inside and plug the OBD I scan tool into this port.

2

Put the key into the ignition and turn it to the "On" position but dont start the engine. Turn on the scan tool.

3

Wait for the scan tool to retrieve the codes. Write the codes it displays down on a piece of paper. Turn off the vehicle and unplug the scan tool.

4

Look up the meaning of the codes in the OBD scan tool manual.

The Chevy Express van was introduced in 1996, taking over for the older G-Series versions. Like the G-Series, the Express featured three weight classes and several different engine options. While the location of the oxygen sensors on the exhaust systems is fairly standardized, ensuring youre replacing the correct one may require a little diagnostic time. The Express features V-engines, meaning it employs a right and left exhaust manifold. Each manifold is monitored by an upstream sensor. The converter or converters are also monitored by a downstream sensor.

Instructions

1

Put on the safety glasses and start the van up if the engine is cold.

2

Crawl under the van to locate the correct oxygen sensor or sensors to replace. While the engine is running, spray penetrating lubricant along the threads of the oxygen sensor. Keep spraying on and off and allow the engine to run for a couple minutes to warm up the exhaust system.

3

Crawl back out and shut the engine off and then return to the oxygen sensor with the remaining tools.

4

Disconnect the wire harness plug from the oxygen sensor.

5

Place the wire into the slot on the side of the oxygen sensor socket and then place the socket onto the oxygen sensor. Attach the ratchet to the socket and turn the sensor counterclockwise to unscrew it from the exhaust port.

6

Insert the new oxygen sensor into the exhaust port and then thread it in by hand as far as it will go.

7

Tighten the sensor with the socket and ratchet clockwise until its snug. Do not over-tighten or youll strip the threads of the new sensor out.

8

Reconnect the wire harness connection. Remove the tools and old sensor.

You can read the diagnostic codes for your 95 Chevy Lumina V.6 right from home using an OBD scan tool. This tool can be purchased from any auto parts retailer for the purpose of retrieving diagnostic codes and resetting them. These codes help you troubleshoot problems within your Lumina. The on-board diagnostics computer (OBD) receives diagnostic trouble codes sent to it from various sensors positioned throughout the vehicle. It alerts you to these trouble codes by illuminating a warning or service light on the Luminas instrument panel.

Instructions

1

Find the fuse panel cover under the steering wheel. Pull down on it from the top using your fingers.

2

Find the port to the left side of the fuse panel. Plug the OBD scan tool into this port.

3

Put the key into the ignition and turn it on but dont start the engine. Find the on/off switch on the scan tool and turn it on.

4

Wait for the scan tool to read the codes. Write these codes on a piece of paper. Turn off the scan tool and unplug it from the port. Turn off the vehicle.

5

Look up the meaning of the codes in the scan tools manual.

A 1989 Chevrolet truck may be an S-10 or a member of the C/K series. The S-10 is a compact pickup truck, and the C/K series are full-size pickup trucks. These vehicles generally use an early form of fuel injection called throttle body injection. This type of fuel requires a low-pressure fuel pump that delivers fuel in the range of 9 to 13 pounds per square inch. A malfunctioning fuel pump typically requires you to replace the fuel pump.

Instructions

1

Loosen the fuel filler cap and remove the fuse for the fuel pump in the fuse box of the passenger compartment. Start the engine and allow it to stall. Crank the engine for three seconds and turn the ignition off. Replace the fuse for the fuel pump. Open the hood and disconnect the cable from the negative terminal on the battery with a socket wrench.

2

Siphon the fuel through the filler tube to drain the fuel tank into a gasoline-approved container. Raise the rear of the truck with the jack. Place jack stands under the frame and lower the vehicle onto the stands. Loosen the retaining clamp for the filler hose on the fuel tank, and disconnect the filler hose. Disconnect the fuel and vapor lines from the fuel tank, and disconnect the fuel hoses and electrical wiring from the fuel tank. Raise the jack to support the fuel tank, and remove the straps on the fuel tank. Lower the fuel tank slightly to gain access to the fuel sending unit. Disconnect the fuel lines and electrical wiring from the fuel sending unit. Lower the fuel tank to the ground.

3

Turn the cam locking ring on the fuel sending unit counterclockwise with tool No. J-24187 or J-36608. Remove the cam locking ring, and disconnect the fuel sending unit from the fuel tank. Discard the old gasket on the fuel tank. Pull the fuel pump from the bottom support and into the mounting tube without damaging the insulator or the fuel strainer. Pull the fuel pump out of its rubber connector.

4

Push the new fuel pump into the mounting tube of the fuel sending unit, and place the new gasket onto the fuel tank. Lower the fuel sending unit into the fuel tank without folding the fuel strainer.

5

Attach the cam locking ring on the fuel sending unit. Turn the locking ring clockwise with tool No. J-24187 or J-36608 until the locking ring locks into place. Connect the fuel tank and fill it with fuel. Connect the cable for the negative battery terminal, and check the fuel system for leaks.

Chevrolets V6 engine did not exist until 1977. That was the year Chevy introduced the 90-degree V6. General Motors, Chevrolets parent company, has been producing V6s since 1960. Chevy used GMC V6s in trucks from 1984 to 1987, until replaced by a Chevy V6. Chevrolet V6 identification is easy, both visually and by using engine ID numbers.

Instructions

1

Confirm that the Vehicle is a Chevrolet. With the exception of the 1984 through 1987 pickup truck model years, Chevrolet for more than three decades has only used the Chevy V6. So if it is a Chevrolet built since 1977, chances are good it has the Chevy V6 engine.

2

Identify the engine as a 6-cylinder. The best way to differentiate a 6-cylinder engine from other engines is to count six spark plugs, three on each side.

3

Locate the ID number on the engine block. According to Nasty Z28, the numbers are located on the passenger side of the block behind the distributor. On a front wheel-drive, look behind the distributor.

4

Decode the engine ID number. The Chevrolet engine ID number is usually seven to eight digits long. It features numbers and letters, with a prefix and a suffix. The suffix is three letters long and identifies the engine size, horsepower and vehicle model. In engine number V0106CMJ, for example, "CMJ" is the suffix. The preceding prefix numbers supply information about the date and location of the vehicles production.

5

Contact a Chevrolet parts department with the full engine ID number. They can decode it for you. Or you could visit GM Parts Direct online. Either type the number in the search box or send a message to the customer service department and they will decode it for you.

6

Identify the casting lug-nut on the engine block. It is located on the right side as you face the front of the engine, towards the bottom. There will be a lug nut attached to a stud. According to HotSixes, differentiate the size V6 using the following data: the 200 c.i.d. has no lug nut; the 229 c.i.d. has one lug nut; and the 262 c.i.d. has two lug nuts, one on the right and left sides of the block.

Replacing the bulbs in the taillight assembly on the rear of your Chevy S10 pickup is important. If the taillights are not functioning properly, drivers behind you will not know you are stopping and may run into your truck. The S10 taillight assembly uses a standard 3157 bulb, available at any auto parts store and through a Chevy dealer. Check both lights before you purchase new bulbs, so you can get two, if needed. You can replace both bulbs in about 15 minutes.

Instructions

1

Lower the tailgate of your S10, and allow it to rest on the support cables. Locate the two retaining screws in the bedside near the tailgate latch, and remove them with a Phillips screwdriver.

2

Pull the taillight away from the bedside, and locate the bulb socket on the rear of the assembly. Turn the socket counterclockwise, pulling it out of the assembly, after it is free.

3

Pull the bulb out of the bulb socket, and discard it. Install a new bulb into the socket, pushing it in until it sits in the socket. Slide the bulb and socket into the rear of the taillight assembly, and turn it clockwise, locking it in place.

4

Install the taillight assembly on the rear of the truck, install the retaining screws, and tighten them with a Phillips screwdriver. Close the tailgate, and test the lights by turning on the headlight switch inside the truck.