Important: When replacing the evaporative emission (EVAP) tube, always replace the tube with original equipment or parts that meet the GM specifications for this part. The replacement tube must have the same type of fittings as the original tube in order to ensure the integrity of the connection.

1. Remove the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical-4.8L, 5.3L, and 6.0L.
2. Remove the EVAP purge solenoid vent tube by performing the following:

2.1.	Push the retainer inward and pull up on the connector.

2.2.	Remove the EVAP tube end (2) from the solenoid (1).

2.3.	Remove the EVAP tube end (3) from the vapor pipe.

1. Connect the EVAP tube end (3) to the vapor pipe.
2. Connect the EVAP tube end (2) to the solenoid (1).
3. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical-4.8L, 5.3L, and 6.0L.

Important: Clean all the fuel pipe connections and the surrounding areas prior to disconnecting the pipes in order to avoid possible fuel system contamination.

1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
2. Disconnect the fuel feed (1) and return pipes (2) from the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
3. Disconnect the evaporative emission (EVAP) tube rear connection.
4. Cap the fuel rail pipes.
5. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
6. Remove the fuel hose/pipe bracket nut (5) from the bellhousing stud.
7. Remove the fuel hose/pipe bracket from the bellhousing stud.



8. Remove the fuel hose/pipe clip from the transfer case bracket, if equipped with four wheel drive (4WD).
9. Remove the fuel hose/pipe clips from the transmission brackets.
10. Remove the EVAP canister. Refer to Evaporative Emission Canister Replacement .



11. Disconnect the fuel feed and return hose/pipes at the fuel tank. Refer to Plastic Collar Quick Connect Fitting Service .
12. Cap the fuel tank hose/pipes.



13. Remove the fuel hose/pipe retaining clip (1) nuts.
14. Remove the fuel hose/pipe assembly.

Important: 

1. Install the fuel hose/pipe assembly.
2. Install the fuel hose/pipe retaining clip (1) nuts.



3. Remove the caps from the fuel tank hose/pipes.
4. Connect the fuel feed and return hose/pipes at the fuel tank. Refer to Plastic Collar Quick Connect Fitting Service .
5. Install the EVAP canister. Refer to Evaporative Emission Canister Replacement .
6. Install the fuel hose/pipe clips to the transmission brackets.



7. Install the fuel hose/pipe clip to the transfer case bracket, if equipped with 4WD.



8. Install the fuel hose/pipe bracket to the bellhousing stud.
9. Install the fuel hose/pipe bracket nut (5) to the bellhousing stud.
10. Lower the vehicle.
11. Remove the caps from the fuel rail pipes.
12. Connect the EVAP tube rear connection.
13. Connect the fuel feed (1) and return pipes (2) to the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
14. Install the fuel fill cap.
15. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
16. Use the following steps in order to inspect for fuel leaks:

16.1.

Turn ON the ignition, with the engine OFF, for 2 seconds.

16.2.

Turn OFF the ignition for 10 seconds.

16.3.

Turn ON the ignition, with the engine OFF.

16.4.

Inspect for fuel leaks.

17. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical-4.8L, 5.3L, and 6.0L.

Important: 

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Disconnect the rear EVAP purge tube (3) from the EVAP pipe (2).
3. Disconnect the rear EVAP purge tube from the EVAP canister (4).
4. Remove the rear EVAP purge tube from the clip (1).
5. Cap the EVAP pipe and canister in order to prevent possible EVAP system contamination.

1. Remove the caps from the EVAP pipe and canister.
2. Connect the rear EVAP purge tube (3) to the EVAP canister (4).
3. Connect the rear EVAP purge tube to the EVAP pipe (2).
4. Install the rear EVAP purge tube to the clip (1).
5. Lower the vehicle.

Important: 

1. Remove the fuel tank. Refer to Fuel Tank Replacement .
2. Disconnect the EVAP vent tube (4) at the EVAP canister.
3. Disconnect the EVAP vent tube at the EVAP vent valve (2).
4. Remove the EVAP vent tube from the clips (1).
5. Cap the EVAP vent valve and canister in order to prevent possible EVAP system contamination.

1. Remove the caps from the EVAP vent valve and canister.
2. Connect the EVAP vent tube to the EVAP vent valve (2).
3. Connect the EVAP vent tube (4) to the EVAP canister.
4. Install the EVAP vent tube to the clips (1).
5. Install the fuel tank. Refer to Fuel Tank Replacement .

Important: 

1. Remove the fuel tank. Refer to Fuel Tank Replacement .
2. Disconnect the rear EVAP tube (1) from the fuel sender (2), and roll over valve (3). Refer to Plastic Collar Quick Connect Fitting Service .
3. Remove the rear EVAP tube (1) from the fuel tank clips (6).
4. Cap the fuel sender and the roll over valve in order to prevent system contamination.

1. Remove the caps from the fuel sender and the roll over valve.
2. Connect the rear EVAP tube (1) to the fuel sender (2), and roll over valve (3). Refer to Plastic Collar Quick Connect Fitting Service .
3. Install the rear EVAP tube (1) to the fuel tank clips (6).
4. Install the fuel tank. Refer to Fuel Tank Replacement .