Rajan Wilcox
Changing the fuel pump in a 2006 Chevy Trailblazer is a complex task that requires a range of tools and a good understanding of car mechanics. It is important to relieve pressure from the fuel system before attempting to change the fuel pump. This can be done by disconnecting the fuel pump relay and cranking the engine. The negative battery cable should also be disconnected. The fuel filter can be located underneath the middle section of the vehicle on the driver's side. The locking nuts around the fuel filter can then be removed with pliers, and a new fuel filter can be installed, ensuring that the arrow is pointing towards the rear of the vehicle. Finally, the fuel relay and negative battery cable can be reconnected, and the engine can be started to check for leaks.
| Characteristics | Values |
|---|---|
| Vehicle | 2006 Chevy Trailblazer |
| Fuel pump and filter location | Underneath the middle section of the vehicle on the driver's side |
| Fuel pump locking ring tool | J44402 or J45722 |
| Fuel pump module retaining ring removal method | Hammer and punch |
What You'll Learn
Disconnect the negative battery terminal
Disconnecting the negative battery terminal is one of the first steps to take when changing the fuel pump on a 2006 Chevy Trailblazer. Here is a detailed, step-by-step guide on how to do this:
Step 1: Pop the hood of your Trailblazer and locate the fuse box. The fuse box is usually situated over the driver's side wheel.
Step 2: With the engine running, pull the relay for the fuel pump. The engine should die within a few seconds.
Step 3: Crank the engine a few times to relieve the pressure in the fuel system.
Step 4: Use a wrench or pliers to disconnect the negative battery terminal. Ensure that you only disconnect the negative terminal, which is black and usually on the right side of the battery.
Step 5: Once the negative terminal is disconnected, open the gas cap.
Disconnecting the negative battery terminal is a crucial safety step when working on any electrical components of your vehicle. It ensures that the electrical system is deactivated, preventing any accidental short circuits or electrical shocks.
It is important to note that you should not disconnect the positive terminal (usually red) unless absolutely necessary, as this could cause electrical damage to your vehicle's computer systems.
Additionally, always refer to your owner's manual for specific information regarding your Chevy Trailblazer model, as procedures may vary slightly between different model years.
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Remove the cross bar
To remove the cross bar, you will need to access the fuse box by popping the hood of your Chevy Trailblazer. With the engine running, pull the relay for the fuel pump. The engine will die within a few seconds. Now, crank the engine a few times to relieve the pressure. Next, disconnect the negative battery terminal and open the gas cap. Using a short Phillips screwdriver, loosen the screw on the fuel filter. You also want to press in on the schrader valve to release any pressure in the lines. Gas may come out of the schrader valve if there is still pressure in the lines.
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Loosen the screw on the fuel filter
To loosen the screw on the fuel filter of your 2006 Chevy Trailblazer, you will first need to relieve the pressure in the fuel system. This is done by opening the fuse box (located over the driver's side wheel), disconnecting the fuel pump relay, and cranking the engine until it stalls out.
Next, disconnect the negative battery cable using pliers. This will prevent the fuel system from re-pressurising.
Now you can locate the fuel filter. It is underneath the middle section of the vehicle on the driver's side, directly in front of the gas tank and next to the frame rail.
Use pliers to loosen the screw on the fuel filter. Be careful, as some gasoline may still drip down.
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Release pressure in the lines
To release pressure in the lines, you must first relieve the pressure from the fuel system. To do this, open the fuel door and remove the gas tank cap. Pop the hood and access the fuse box. With the engine running, pull the relay for the fuel pump and the engine will die within a few seconds. Crank the engine a few times to relieve the pressure.
Next, disconnect the negative battery terminal and open the gas cap. You will need to relieve the pressure in the lines by pressing in on the schrader valve. Gas may come out if there is still pressure in the lines, so be sure to have a container ready to catch any fuel.
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Disconnect the fuel lines
To disconnect the fuel lines of your 2006 Chevy Trailblazer, you will need to press in the clips (blue on the filter) and squeeze the other lines. No special tools are needed for this.
Note that there are two more lines that must be disconnected – one at the top that may be partially hidden. You may need to use a flashlight to make sure you don't miss any connections.
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Frequently asked questions
You will need to drop the tank and remove the old fuel pump before installing a new one. This is a complex process that requires safety precautions and a good understanding of car mechanics. If you are not confident, seek professional help.
You will need a car jack, wood blocks, car ramps, a new fuel pump, a new external fuel filter, a short Phillips-head screwdriver, a small ratchet, a 7mm socket, a size 15 socket, an extension, a 1/2-inch ratchet, a flashlight, a vacuum, a wet towel, a fuel tank sending unit wrench, and a long breaker bar.
The process can take anywhere from 30 minutes to 6 hours, depending on your level of expertise and whether you encounter any difficulties.
Yes, some people have reported issues with the fuel pump locking ring. It is recommended to have a helper when bringing down the tank to avoid causing damage to the wires.
