Replacing The Fuel Pump In A 2000 Yukon: Step-By-Step Guide

If you're experiencing jolting after acceleration or a sudden increase in fuel consumption, your GMC Yukon may be in need of a fuel pump replacement. In this guide, we'll walk you through the steps to replace the fuel pump in a 2000 GMC Yukon, ensuring your SUV runs smoothly and efficiently. It's important to note that working with the fuel system can be dangerous, so unless you're an experienced auto repair enthusiast, it's recommended to leave this task to a professional.

Disconnecting the negative terminal on the battery

Locate the negative terminal on your Yukon's battery. It is usually marked with a "-" sign or a black cover.

Make sure you have the necessary tools, in this case, an 8-millimeter wrench.

Using the wrench, loosen the nut that secures the negative battery cable to the terminal. Turn the wrench in a counter-clockwise direction to loosen it.

Once the nut is loosened, carefully slide the cable off the terminal. It is important that you do not let the cable touch any metal parts of the car, as it could cause a short circuit.

Move the cable away from the battery and cover it with a piece of insulation or tape to ensure it does not accidentally make contact with any metal surfaces.

At this point, you can continue with the next steps of replacing the fuel pump, such as relieving the pressure in the fuel system and removing the fuel lines. Remember to work carefully and refer to a qualified mechanic or a repair manual if you are unsure about any steps.

Removing the fuel pump's access cover

To remove the fuel pump's access cover on a 2000 GMC Yukon, start by disconnecting the negative terminal on the battery using an 8-millimetre wrench. Slide off the terminal and move it out of the way. If there is a cover on the fuel line, remove it with an 8-millimetre bolt. Pull off the cap and use a rag and a straight-blade screwdriver to relieve the pressure in the fuel system.

Next, disconnect the fuel line by squeezing and twisting the connector. There may be some fuel spray, so be prepared to catch it with a rag. Now, remove the connector going to the vent canister. This can be done by hand or with pliers. Then, remove the filler neck hose using an 8-millimetre socket or a straight-blade screwdriver.

At this point, you can start to lower the fuel tank. Use a transmission jack with a special adapter to support the tank. Remove the bolts holding the fuel tank straps in place with a 15-millimetre socket. Be sure to do this by hand, as using an impact gun will damage the nut. With the bolts removed, you can now slide the straps down and out.

With the straps removed, you can continue to lower the fuel tank. Be sure to have as little fuel in the tank as possible, and siphon off any excess if necessary. Once the tank is lowered, you can access the fuel pump for replacement.

Draining fuel before removing the access panel

To drain the fuel before removing the access panel of your 2000 GMC Yukon, you will need to take the following steps:

Firstly, disconnect the negative terminal on the battery using an 8-millimetre wrench. Slide it off and put it somewhere out of the way. If there is a cover, remove it with an 8-millimetre bolt and pull it off. Next, take a rag and a straight-blade screwdriver. Push on the fuel line with the screwdriver, but be sure to use the rag so that the fuel doesn't spray.

Now, relieve the pressure. There is not much pressure in this system, but it is important to do this to prevent fuel from spraying out. Put the cap back on. At the back of the tank, take the fuel line off. You can do this by squeezing the connector and twisting it back and forth. You will need to do this for both sides.

Next, disconnect the lines on the front of the tank. Be sure to place a rag around the connector to catch any fuel that may spray out. Disconnect the EVAP vapour line by pushing on the two tabs. You will also need to remove the clip that holds the fuel pressure line in place.

Now, you can tip the tank down at the back. Once the filler neck gets past the rear differential, you can back the tank up a little more. Disconnect the electrical connector and lower the tank all the way. Let some of the fuel drain and have a bucket nearby to catch the fuel.

Disconnecting the fuel lines

First, ensure you have the right tools for the job. You will need a flat blade screwdriver, a wrench (8-millimetre and 15-millimetre), a transmission jack with a fuel tank adapter, a pick, and some rags. It is also recommended to have a bucket nearby to catch any fuel that may spill during the process.

Now, let's begin:

Step 1: Disconnect the negative terminal on the battery using the 8-millimetre wrench. Ensure you cover the terminal with a rag to avoid any sparks.

Step 2: Remove any cover on the fuel line. This is usually secured with an 8-millimetre bolt. Once removed, use a straight-blade screwdriver and a rag to relieve the pressure in the fuel system.

Step 3: Locate the fuel line at the back of the tank and carefully remove it by squeezing and twisting the connector. You may need to use pliers or a pick to get underneath and twist it off.

Step 4: Disconnect the connector to the vent canister. This can usually be done by hand, but if it's too tight, carefully use pliers or a pick to twist it off.

Step 5: Remove the filler neck hose using an 8-millimetre socket or a straight-blade screwdriver. Loosen the connection and use a pick to twist and pop it off if needed.

Step 6: Lower the fuel tank slightly. You may need to siphon some fuel out first to reduce the weight and make it easier to handle.

Step 7: Disconnect the fuel lines at the front of the tank. Start with the EVAP vapour line by pushing on the two tabs to disconnect it. Then, locate the fuel pressure line and carefully remove the clip holding it in place. Use a rag to catch any fuel that may spray out.

Step 8: Tip the fuel tank down at the back and slide it back to fully disconnect the fuel lines.

Step 9: Disconnect the electrical connector and any other lines or connectors attached to the fuel tank.

By following these steps, you will have successfully disconnected the fuel lines on your 2000 GMC Yukon. Remember to work carefully and always be cautious of any fuel that may spill or spray during the process.

Installing the new fuel pump

To install the new fuel pump, first, you need to transfer the lock ring to the new pump. You can use a special tool or a brass punch and hammer to do this. Just be careful not to ruin the tank. Once the lock ring is removed, slide out the old pump and put the new one in its place. Make sure the level sensor is lined up correctly and carefully push it down to lock it in place.

Next, you'll need to connect the hoses to the new pump. Use a pick tool to get behind the tabs and slide the hoses into position, locking them in place. Then, take the new seal and put it on the connector, before sliding the line back on. Now, reconnect the electrical connector and the fuel lines, making sure to wrap a rag around the connector to avoid any fuel spray.

After this, you can reposition the tank and connect the fuel pressure sensor, ensuring it locks in place. Don't forget to also connect the vapor line and the fuel line. Finally, you can tighten the bolts on the straps and lower the transmission jack.

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