Replacing Fuel Pump In 2001 Gmc Yukon: Step-By-Step Guide

If you're looking to replace the fuel pump in your 2001 GMC Yukon, there are a few things you should know. The process involves disconnecting the negative terminal on the battery, relieving the pressure in the fuel system, and lowering the fuel tank. You'll also need to disconnect various lines and connectors, including the EVAP vapor line and the electrical connector. It's important to have as little fuel in the tank as possible to avoid spills. The labor time for this task is estimated to be around 3.2 to 3.4 hours, depending on the size of the fuel tank.

Disconnect the negative terminal on the battery

Disconnecting the negative terminal on the battery of your GMC Yukon is a crucial first step when making any electrical repairs to your vehicle, including changing the fuel pump. Here is a detailed, step-by-step guide on how to do this safely and effectively:

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Locate the negative terminal on your GMC Yukon's battery. It is typically identified by a black cover and a "-" symbol. Before beginning, ensure you have the necessary tools, including a suitable wrench, in this case, an 8-millimeter wrench. Having a clean rag and a flat blade screwdriver on hand is also recommended.

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Once you have located the negative terminal, the next step is to carefully disconnect it. Using your 8-millimeter wrench, loosen the terminal by turning it counterclockwise. If there is a cover on the battery, remove it first. This cover is usually secured by an 8-millimeter bolt, which you can unscrew and set aside.

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With the cover removed, you will have access to the negative terminal. Slide the wrench onto the terminal and turn it in the same counterclockwise direction to loosen and remove the connection. It is important to handle the battery terminal carefully, as it may have a buildup of corrosive material. If necessary, use your rag to clean off any corrosion before proceeding.

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After disconnecting the negative terminal, ensure you move it away from the battery to avoid any accidental reconnection. You may also want to secure it in place with a non-conductive material, such as tape, to prevent it from moving around and potentially causing a short circuit. This step is crucial for safety, as it prevents the flow of electricity to the battery while you work on other parts of the vehicle.

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Now that the negative terminal is disconnected and secured, you can proceed with confidence, knowing that there is no power running through the battery. Remember to reconnect the negative terminal properly once you have completed your repairs. This will ensure that your GMC Yukon's electrical systems function correctly when you start the vehicle.

Remove the cover and pull off the fuel line cap

To remove the cover and pull off the fuel line cap of your 2001 GMC Yukon, start by disconnecting the negative terminal on the battery using an 8-millimetre wrench. Slide it off and move it out of the way. If there is a cover, remove it. Typically, there is an 8-millimetre bolt holding it in place. Pull off the cover from the fuel line, exposing the cap.

Take a rag and a straight-blade screwdriver. Push on the cap with the screwdriver, and use the rag to prevent the fuel from spraying out. This will relieve the pressure in the fuel system. Once the pressure is relieved, put the cap back on.

Relieve the pressure in the system

To relieve the pressure in the system, start by disconnecting the negative terminal on the battery using an 8-millimeter wrench. Slide it off and put it aside. If there is a cover, remove it with an 8-millimeter bolt and pull it off. Take off the cover from the fuel line, and use a rag and a straight-blade screwdriver to push down on the fuel line cap. This will relieve the pressure in the system. Be sure to put the cap back on when you're done.

Disconnect the filler neck hose

Disconnecting the filler neck hose is a crucial step in changing the fuel pump of a 2001 GMC Yukon. Here is a detailed guide on how to do it:

First, locate the filler neck hose. It is usually found at the back of the fuel tank. To reach it, you may need to lower the fuel tank slightly. Make sure that there is as little fuel in the tank as possible, as this will make the process easier and safer. If necessary, siphon some of the fuel out.

Once you have located the filler neck hose, use an 8-millimetre socket or a straight-blade screwdriver to loosen the connection. You may need to use a pick to get underneath the connection and twist it to loosen it further. It's okay if you can't pop the hose off just yet; just make sure it's loose.

Now, lower the fuel tank a little more. This will give you more room to work and make it easier to access the hose. Be careful not to lower the tank too much, as you don't want it to touch the ground or any other obstacles.

With the tank lowered, you should now be able to pry the hose off. Again, a pick tool might be useful for this step. Work carefully and slowly to avoid any damage to the hose or the surrounding components.

Once the hose is removed, set it aside in a safe place. You may also want to clean up any residual fuel in the area with a rag.

By following these steps, you should be able to successfully disconnect the filler neck hose when changing the fuel pump on your 2001 GMC Yukon. Remember to take your time, work carefully, and ensure that there is minimal fuel in the tank to avoid any safety hazards.

Lower the fuel tank

To lower the fuel tank of a 2001 GMC Yukon, you will need a transmission jack with a special adapter for fuel tanks. This will support the tank as you lower it.

First, you will need to relieve the pressure in the fuel system. Disconnect the negative terminal on the battery using an 8-millimetre wrench. Remove the cover, normally held on by an 8-millimetre bolt. Pull off the fuel line cap and use a rag and a straight-blade screwdriver to relieve the pressure.

Next, disconnect the filler neck hose using an 8-millimetre socket or straight-blade screwdriver. Loosen the hose by twisting it with a pick. You may not be able to pop it off until you start lowering the tank, so just make sure it is loose.

Now, you can start to lower the tank. Use the transmission jack to support it as you remove the bolts holding the straps in place. Take the bolts out by hand using a 15-millimetre socket, as using an impact gun will wreck the nut. Once the bolts are out, you can slide the straps down and out.

With the straps removed, you can lower the back of the fuel tank. Keep in mind that you want as little fuel in the tank as possible, so you may need to siphon some out.

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