Mercedes Mullins
If you're experiencing fuel leakage in your 2008 Chevy, you may need to replace the fuel filler neck. This is because fuel leakage can be very dangerous, as the vapours given off by the fuel are extremely flammable. If there is a leak at the fuel filler neck, there is a risk of the fuel vapours igniting when rocks are thrown up into the wheel well or under the vehicle, causing a spark. To replace the fuel filler neck, you will need to park your vehicle on a flat, hard surface, with the transmission in park (for automatics) or in 1st gear (for manuals). You will then need to open the fuel door to gain access to the fuel filler neck and remove the mounting screws or bolts attached to the cutaway.
| Characteristics | Values |
|---|---|
| Step 1 | Park your vehicle on a flat, hard surface. Make sure that the transmission is in park (for automatics) or in 1st gear (for manuals). |
| Step 2 | Open the fuel door to gain access to the fuel filler neck. |
| Step 3 | Remove the mounting screws or bolts attached to the cutaway. |
| Step 4 | Remove the fuel filler cap cable from the fuel neck and place aside. |
| Step 5 | Locate the fuel tank. Go under the vehicle and locate the fuel tank. |
| Step 6 | Lower the fuel tank. Take a transmission jack or similar jack and place it under the fuel tank. Loosen and remove the straps to the fuel tank and lower the fuel tank a little. |
| Step 7 | Disconnect the harness from the connector. Reach up on top of the fuel tank and feel for a harness attached to the tank. |
| Step 8 | Clean up the piece removing the bracket that held the small vent tube that ran up next to the filler. |
| Step 9 | Get a piece of 2" fuel-safe hose, some clamps, and gasket sealer. |
| Step 10 | Remove the existing vent hose. |
| Step 11 | Flares out the end of the new hose so you can overlap it over the stock vent hose. |
| Step 12 | Cut the new hose to fit over the steel piece of the filler neck and apply the gasket sealer. |
| Step 13 | Slide the new hose over the steel neck and hose clamp it up by the filler end, against the mounting bracket. |
| Step 14 | Slide the stock hose back on and sandwich it between the new hose and its original spot on the steel neck. |
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What You'll Learn
Removing the mounting screws or bolts attached to the cutaway
To remove the mounting screws or bolts attached to the cutaway, you will first need to open the fuel door to access the fuel filler neck. Once you have done this, you can remove the mounting screws or bolts. It is important to make sure your vehicle is parked on a flat, hard surface and that the transmission is in park (for automatics) or in 1st gear (for manuals).
You can purchase replacement fuel filler necks from auto parts stores or dealerships. It is recommended that you purchase a fuel filler neck from the dealership since it is an original manufactured equipment, or OEM. Fuel leakage in a vehicle can be very dangerous. Liquid fuel does not burn, but the vapors given off by the fuel are extremely flammable. If there is a leak at the fuel filler neck, there is a risk of the fuel vapors igniting when rocks are thrown up into the wheel well or under the vehicle, causing a spark.
Once you have removed the mounting screws or bolts, you can remove the fuel filler cap cable from the fuel neck and place it aside. You will then need to locate the fuel tank. Go under the vehicle and lower the fuel tank using a transmission jack or similar. Loosen and remove the straps to the fuel tank and lower it a little. Reach up on top of the fuel tank and feel for a harness attached to the tank. Disconnect the harness from the connector.
If you are reusing the old hose, you can flare out the end of the hose so that it overlaps the stock vent hose. Cut it to fit over the steel piece of the filler neck and apply gasket sealer. Slide the new hose over the steel neck and hose clamp it up by the filler end, against the mounting bracket. Finally, slide the stock hose back on and sandwich it between the new hose and its original spot on the steel neck.
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Locating and lowering the fuel tank
To locate and lower the fuel tank, follow these steps:
- Park your vehicle on a flat, hard surface. Ensure that the transmission is in park (for automatics) or in 1st gear (for manuals).
- Open the fuel door to access the fuel filler neck.
- Remove the mounting screws or bolts attached to the cutaway.
- Remove the fuel filler cap cable from the fuel neck and set it aside.
- Go under the vehicle and locate the fuel tank.
- Place a transmission jack or similar jack under the fuel tank. Loosen and remove the straps to the fuel tank and lower it slightly.
- Disconnect the harness from the connector by reaching up on top of the fuel tank and feeling for a harness attached to the tank.
Note: It is important to purchase a fuel filler neck from a dealership as it is an original manufactured equipment (OEM).
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Disconnecting the harness from the connector
To disconnect the harness from the connector, you will need to reach up on top of the fuel tank and feel for a harness attached to the tank. Once you have located the harness, you can disconnect it from the connector.
It is important to note that fuel leakage in a vehicle can be very dangerous. Liquid fuel does not burn, however, the vapors given off by the fuel are extremely flammable. If there is a leak at the fuel filler neck, there is a risk of the fuel vapors igniting when rocks are thrown up into the wheel well or under the vehicle, causing a spark.
Before beginning any work on the fuel filler neck, it is recommended that you park your vehicle on a flat, hard surface and ensure that the transmission is in park (for automatics) or in 1st gear (for manuals). This will help to prevent any accidental movement of the vehicle during the repair process.
Additionally, when working on the fuel filler neck, it is important to be aware of the sensors that sniff for vapors and make the engine light come on when vapors are present. Some common engine light codes related to fuel vapors near the fuel filler neck include: [list of codes].
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Removing the existing vent hose
To remove the existing vent hose, you will need to park your vehicle on a flat, hard surface and ensure that the transmission is in park (for automatics) or in 1st gear (for manuals). Once your vehicle is securely parked, open the fuel door to gain access to the fuel filler neck. Remove the mounting screws or bolts attached to the cutaway. You may need to remove the fuel filler cap cable from the fuel neck and place it aside.
Next, locate the fuel tank by going under the vehicle. Place a transmission jack or similar jack under the fuel tank and loosen and remove the straps to lower the fuel tank slightly. Reach up on top of the fuel tank and feel for a harness attached to the tank. Disconnect the harness from the connector.
At this point, you should be able to access the existing vent hose. Clean up the piece by removing any rust or debris that may be present. Remove the bracket that holds the small vent tube that runs up next to the filler. With the bracket removed, you can now slide off the existing vent hose.
It is important to note that fuel leakage in a vehicle can be very dangerous. Liquid fuel does not burn, but the vapours given off by the fuel are extremely flammable. If there is a leak at the fuel filler neck, there is a risk of the fuel vapours igniting when rocks are thrown up into the wheel well or under the vehicle, causing a spark. Always exercise caution when working with fuel systems and ensure proper ventilation.
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Purchasing a replacement fuel filler neck
When purchasing a replacement fuel filler neck, it's important to keep in mind that fuel leakage in a vehicle can be very dangerous. Liquid fuel does not burn, but the vapours it gives off are extremely flammable. If there is a leak at the fuel filler neck, there is a risk of the fuel vapours igniting when rocks are thrown up into the wheel well or under the vehicle, causing a spark.
You can purchase replacement fuel filler necks from auto parts stores and dealerships. It is recommended that you purchase a fuel filler neck from the dealership since it is an original manufactured equipment, or OEM.
Before purchasing a replacement, you should park your vehicle on a flat, hard surface. Make sure that the transmission is in park (for automatics) or in 1st gear (for manuals). This will ensure that the vehicle is stable and secure while you work on it.
When you are ready to replace the fuel filler neck, open the fuel door to gain access. Remove the mounting screws or bolts attached to the cutaway. Remove the fuel filler cap cable from the fuel neck and place it aside.
You will also need to locate and lower the fuel tank. Take a transmission jack or similar jack and place it under the fuel tank. Loosen and remove the straps to the fuel tank and lower it slightly. Reach up on top of the fuel tank and feel for a harness attached to the tank. Disconnect the harness from the connector.
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