How to Change the Fuel Filter on Gmc Cars

by Contributing Writer

The Gmc car uses an in-line fuel filter for removing any debris that is in the fuel lines. The fuel pump is located in the fuel tank and suctions the fuel to send it through the fuel line and eventually to the injectors. There is a small strainer attached to the fuel pump that catches most of the debris and prevents it from entering the fuel lines. Some of the debris is small enough to get through the strainer and the fuel filter will remove these particles. Changing your fuel filter will help improve fuel economy and also engine performance.

Under The Hood:

 How to Change the Fuel Filter on a 1997 GMC Jimmy

Assemble your metal vehicle ramps at the front tires and inside rear tires of your 1997 GMC Jimmy on a flat surface. With another person guiding you, drive your Jimmy up onto the metal ramps. Park it and pull the emergency brake to prevent the truck from rolling while you are working. Disconnect the battery cables. Wait for the engine to become cold. Use the rolling creeper to slide under the vehicle. The fuel filter is on the driver's side frame rail. Put on your safety goggles.

Loosen the fittings on the inlet and outlet fuel filter lines in your 1997 Jimmy. The fuel line is pressurized, so always loosen the engine-side or front end of the fuel filter line first. This will prevent gasoline from squirting into your eyes or on your clothing. If you wait until the engine is cold before working on it, the pressure in the fuel line will be lower. Hold the 21mm line wrench on the fuel filter fitting with one hand, and turn the 16mm line wrench counter-clockwise with the other hand to loosen the fitting nut on the fuel line. Do the same with the back end of the fuel filter.

Use the ratchet wrench to loosen and unbolt the black plastic fuel filter mounting bracket from the frame rail of the Jimmy. You don't need to remove it completely. Once the mounting bracket is loose, turn and pull the fuel filter out in the direction of the engine.

Get your new 1997 GMC Jimmy fuel filter, and push and turn it into the loosened mounting bracket. Screw it into the outlet fuel line and hand-tighten the fittings. Do the same with the fittings on the inlet end of the fuel filter.

Tighten the fittings with your line wrenches, then get your ratchet wrench and tighten the two mounting bracket bolts to the frame rail. You are now set to get much better gas mileage on your 1997 GMC Jimmy.

Items you will need

  • Modular metal vehicle ramps

  • Rolling creeper

  • Safety goggles

  • 21mm line wrench

  • 16mm line wrench

  • 3/8-inch ratchet wrench with 1/2-inch socket

  • New in-line fuel filter

 How to Change a Fuel Filter on a 2001 GMC Sonoma

Park the truck on a flat and level surface. Ensure the wheels are chocked and the parking brake is set.

Open the hood for access to the fuse panel behind the battery. Open the fuse panel and pull the fuel pump relay. The relays will be labeled for easy identification.

Start the truck. Allow the truck to idle until it stalls. This will depressurize the fuel system. Insert the relay back into the fuse panel.

Find the filter under the truck. The filter is located by the driver side underneath the truck. Following the fuel line coming out of the fuel tank will also help you to find the filter.

Loosen the outlet line from the filter by holding the stationary nut on the filter with a line wrench. Loosen the nut on the fuel line with a second wrench.

Pull the inlet line off by separating the tabs on the quick disconnect fitting. Pull it away from the filter.

Unbolt the mounting bracket with a socket wrench. Pull the bracket and the filter off the frame rail.

Slide the new filter on the bracket. Tighten it to the frame rail with the socket wrench.

Push the inlet line onto the filter. The fitting will lock in place once it is pushed far enough on the inlet pipe.

Bolt the outlet line onto the filter with a line wrench. Hold the inner stationary nut with a line wrench and tighten the line down with a second wrench.

Start the truck. Observe the filter for any leaks.

Items you will need

  • Line wrench set

  • Socket wrench

  • Socket set

  • Fuel filter

  • 2 wheel chocks

 How to Change a Fuel Filter in a GMC S15

Open the hood to access the engine compartment. Locate the fuse relay box behind the battery. Open the panel and pull the relay for the fuel pump by hand.

Start the truck to let it idle. The truck will stall once the fuel system is depressurized. Insert the relay back into the fuse panel.

Crawl under the truck by the driver-side door. The fuel filter is located under the driver-side door.

Loosen the outlet line with a line wrench. There will be two nuts on each side. The one attached to the filter is stationary and needs to be held with a line wrench. Use the second line wrench to loosen the fuel line. Pull it away from the filter. Remove the inlet line the same way.

Loosen the mounting bracket with a socket wrench. Slide the filter away from the bracket.

Position the new filter to the mounting bracket and install to the truck frame with a socket wrench. The arrow on the filter needs to be pointed toward the front of the truck. The arrow designates the direction of fuel flow.

Install the inlet line to the filter by hand. Tighten the line with a line wrench. Hold the stationary nut on the filter with a line wrench. Repeat to install the outlet line.

Turn the ignition key to the "Start" position. Allow the fuel pump to push fuel through the fuel line. This will also purge the air that is in the fuel lines. Turn the key to start the truck. Repeat this step as the truck may not start right away.

Observe the fuel filter while the truck is running. Ensure there are no leaks coming from the filter or the fuel lines.

Items you will need

  • Line wrench set

  • Socket wrench

  • Socket set

  • New fuel filter

 How to Replace the Fuel Filter on a 2000 GMC Sonoma

Pop the hood. Locate the fuel rail on the top of the engine. Connect the fuel-pressure gauge to the fuel rail by hand. Put the drain line from the gauge into the drain pan and press the pressure relief button on the gauge. Let the excess fuel empty into the drain pan. Remove the gauge and remove the gas cap from the gas tank.

Lift the driver's side of the truck with the jack and put it on jack stands. Locate the fuel filter on the inside of the driver's-side frame rail. Remove the clips on the fuel lines running in and out of the fuel filter and pull the lines off the filter.

Unbolt the fuel filter from the frame rail using the 3/8-inch ratchet and socket. Discard the old fuel filter.

Install the replacement fuel filter in the bracket on the frame rail using the 3/8-inch ratchet and socket. Verify that the stamped arrow on the filter is aimed towards the engine. Push the fuel lines onto the fuel filter until it clicks on each side.

Lower the Sonoma off the jack stands using the jack. Start the truck and look underneath the truck to make sure there are no fuel leaks. If so, repeat the steps and recheck the fittings to the filter.

Items you will need

  • Fuel-pressure gauge

  • Drain pan

  • Jack

  • Jack stands

  • Replacement fuel filter

  • 3/8-inch ratchet and socket set

 How to Replace the Fuel Filter in a 2004 GMC Envoy L6

Raise the hood on the Envoy and locate your power distribution center. Take the cover off and then use a pair of relay-puller pliers to remove the fuel pump relay. You can remove the relay by hand, but for safety purposes, use the pliers instead.

Open the fuel door and remove the gas cap slowly to depressurize the fuel tank.

Start the engine and allow the truck to run until it stalls out. After the engine stalls, attempt to start it back up three more times. The engine may run again and then quickly stall. By the third attempt, however the engine will have exhausted all of the fuel pressure and any available gasoline.

Disconnect the black (negative) cable from the battery with a socket wrench. Move the cable completely away from its post so accidental contact with the battery or other metal in the engine area doesn’t happen.

Put on your safety glasses and slide under the Envoy head first near the rear driver’s-side tire. Locate the fuel filter on the frame rail. It will have fuel lines connected to it and look like a metal cylinder a bit bigger than a jar of baby food.

Wipe all of the dirt off each fuel line connected to the fuel filter for two feet in both directions using a shop rag. It’s also a good idea to wipe down the old fuel filter too, even though you’re going to remove it.

Place a metal catch pan beneath the fuel filter and then, one at a time, remove the fuel lines from the filter. The quick-connect fitting can be removed by squeezing in the tabs on the fitting while pulling it off the nipple of the fuel filter. (See the Resource link for a complete breakdown on removing quick-connect fittings of all types.)

Loosen the bolt on the clamp holding the fuel filter in place and then slide the filter out of the clamp. Install the new fuel filter back into the clamp and re-tighten the clamp’s bolt until snug. Before you hook the fuel lines back up, make sure the arrow on the fuel filter is pointing toward the engine and not the gas tank.

Connect the fuel lines by pushing each of the quick-connect fittings back onto the new fuel filter’s nipples until you hear them “click” into place. Check their connection by gently pulling on them if you don’t hear a click when connecting both lines.

Place the gas cap back on tightly and then reinstall the fuel pump relay. Secure the negative battery cable back to its post, then start the engine and check for leaks. If no leaks are observed take the Envoy for a test drive.

Items you will need

  • Relay-puller pliers

  • Socket wrench set

  • Safety glasses

  • Shop rag

  • Metal catch pan

 How to Replace a Fuel Filter on a 2003 Yukon

Open the hood to access the engine compartment. Locate the fuse box in the engine compartment. Disconnect the fuel pump relay inside the fuse box. Start the truck and allow it to idle until it stalls out. Twist off the gas cap on the fuel fill nozzle--this will help to relieve some of the pressure.

Locate the fuel filter under the truck. The filter will be cylindrical-shaped and located under the vehicle near the driver's door.

Unscrew the outlet line of the fuel filter by turning the fuel line nut with a crescent wrench. Hold the nut on the filter with a crescent wrench. Pull the line away from the filter. Unscrew the inlet line in the same fashion. Have a drain pan standing by, as some fuel may still be in the lines.

Unbolt the filter bracket with a socket wrench. Pull the filter away from the mounting bracket.

Place the new filter in the mounting bracket. Tighten it to the frame with a socket wrench. Ensure the arrow on the filter is pointing toward the front of the vehicle. The arrow indicates fuel flow.

Thread the outlet line to the filter by hand. Tighten with a crescent wrench to ensure the nut is tight. Hold the second nut with a crescent wrench to keep the filter from turning. Tighten the inlet line the same way.

Install the fuse relay back into the fuse panel. This will provide power to the fuel pump. Screw the gas cap back onto the fuel fill nozzle.

Turn the ignition key to the "start" position. Leave the key in this position for five seconds, as this will prime the fuel system. Turn the key to start the truck. Allow the truck to idle for five minutes. Inspect around the fuel filter for leaks.

Items you will need

  • Crescent wrench

  • Drain pan

  • Socket wrench

  • Socket set

  • Quick-disconnect tool (for 5.3 liter with flex-fuel engines)

  • New fuel filter