Evaporative Emission System Hoses/Pipes Replacement Engine Compartment EVAP Pipe

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

1. Clean the pipe connections and the surrounding areas before disconnecting in order to avoid possible contamination of the EVAP system.
2. Disconnect the engine compartment EVAP pipe (2) at the EVAP canister purge solenoid (1).
3. Disconnect the engine compartment EVAP pipe (3) at the chassis EVAP pipe.
4. Remove the EVAP pipe from the engine.
5. Cap the EVAP canister purge solenoid and the chassis EVAP pipe in order to prevent possible EVAP system contamination.

1. Remove the caps from the EVAP canister purge solenoid and the chassis EVAP pipe.
2. Install the EVAP pipe on the engine.
3. Connect the engine compartment EVAP pipe (3) to the chassis EVAP pipe.
4. Connect the engine compartment EVAP pipe (2) to the EVAP canister purge solenoid (1).

Evaporative Emission System Hoses/Pipes Replacement Chassis EVAP Pipe

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

1. Clean all the EVAP pipe connections and the surrounding areas before disconnecting the pipes in order to avoid possible contamination of the EVAP system.
2. Disconnect the engine compartment EVAP pipe (6) from the chassis EVAP pipe (3).
3. Cap the engine compartment EVAP pipe.
4. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
5. Remove the left hand catalytic converter. Refer to Catalytic Converter Replacement .
6. Remove the EVAP pipe from the bellhousing stud clip (4).
7. Remove the EVAP pipe from the transmission bracket clip.



8. Disconnect the rear EVAP purge pipe from the EVAP canister.
9. Cap the rear EVAP purge pipe.
10. Note the position of the EVAP pipe for aid in installation.
11. Remove the EVAP pipe from the retaining clips.
12. Remove the EVAP pipe.

1. Install the EVAP pipe into the retaining clips.



2. Remove the cap from the rear EVAP pipe.
3. Connect the rear EVAP purge pipe to the EVAP canister.



4. Install the EVAP pipe into the transmission bracket clip.
5. Install the EVAP pipe into the bellhousing stud clip (4).
6. Install the left hand catalytic converter. Refer to Catalytic Converter Replacement .
7. Lower the vehicle.
8. Remove the cap from the engine compartment EVAP pipe.
9. Connect the engine compartment EVAP pipe (6) to the chassis EVAP pipe (3).

Evaporative Emission System Hoses/Pipes Replacement EVAP Vent Pipe

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

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Clean all the EVAP pipe connections and the surrounding areas before disconnecting in order to avoid possible contamination of the EVAP system.
3. Disconnect the EVAP vent pipe at the EVAP canister.
4. Disconnect the EVAP vent pipe at the EVAP vent valve.
5. Remove the EVAP vent pipe from the mounting clips (1,3,4, and 5).
6. Cap the EVAP vent valve and the EVAP canister in order to prevent possible EVAP system contamination.

1. Remove the caps from the EVAP vent valve and the EVAP canister.
2. Connect the EVAP vent pipe (2) to the EVAP vent valve.
3. Connect the EVAP vent pipe to the EVAP canister.
4. Install the EVAP vent pipe into the mounting clips (1,3,4, and 5).
5. Lower the vehicle.

Evaporative Emission System Hoses/Pipes Replacement Rear EVAP Fuel Tank Pipe

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

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
3. Drain the fuel tank. Refer to Fuel Tank Draining .
4. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
5. Clean all fuel and EVAP pipe and hose connections and the surrounding areas before disconnection in order to avoid possible contamination of the fuel system.
6. Remove the fuel tank. Refer to Fuel Tank Replacement .
7. Remove the rear EVAP pipe from the fuel sender, the fuel tank roll over valve and the fuel tank clips.
8. Cap the fuel sender EVAP pipe and the fuel tank roll over valve.

1. Remove the caps from the fuel sender EVAP pipe and the fuel tank roll over valve.
2. Connect the rear EVAP pipe to the fuel sender, the fuel tank roll over valve, and the fuel tank clips.



3. Install the fuel tank. Refer to Fuel Tank Replacement .
4. Lower the vehicle.
5. Refill the fuel tank.
6. Connect the negative battery cable.
7. Tighten the fuel filler cap.
8. Inspect for leaks.

8.1.	Turn ON the ignition for 2 seconds.

8.2.	Turn OFF the ignition for 10 seconds.

8.3.	Turn ON the ignition.

8.4.	Inspect for fuel leaks.