Left Tank

WARNING: Provide additional support when a vehicle is on a hoist in the following ways:
- Before removing pads, support the opposite end. This helps prevent the vehicle from supping off.
- Before removing major components, chain the vehicle frame to the hoist pads at the same end as the removal. This helps avoid a tip-off.
- Failure to follow these precautions could cause vehicle damage, serious personal injury, or death.

REMOVAL PROCEDURE
1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure. Refer to the Fuel Pressure Release Procedure.
3. Drain the fuel tanks. Refer to Draining Fuel Tanks (Pump Inoperative) or Draining Fuel Tanks (Pump Operational).
4. Remove the mufflers.
5. Remove the left rear wheelhouse panel.




6. Disconnect the fuel fill hose (3) and the vent hose (4).




7. Disconnect the fuel system ground strap.
8. Disconnect the fuel sender electrical connector.
9. Mark or identify each fuel pipe in order to aid in installing the pipes in their original positions.




10. Disconnect the fuel sender fuel feed pipe (1) (jet pump to left tank), the fuel return rear pipe (2), and the fuel feed rear pipe (3) at the fuel sender. Refer to Quick Connect Fittings (Plastic Collar).
11. Cap the fuel pipes in order to prevent possible fuel system contamination.

Description:

12. Remove the tank crossover hose (3).

IMPORTANT: Do not disconnect the EVAP hose at the roll over valve.

13. Carefully disconnect the EVAP hose at the T-connector (1).




14. Remove the fuel tank strap/shield.
15. Remove the fuel tank.


INSTALLATION PROCEDURE

IMPORTANT: Always replace the fuel system hose clamps with the original equipment or parts that meet the GM specifications for those parts when replacing the clamps.

1. Install the fuel tank.
2. Install the fuel tank strap/shield.
3. Install the fuel tank strap/shield bolts.
3.1. Install the net hole location bolt (3).
3.2. Install the slot location bolt (1).
3.3. Install the remaining bolts (2 and 5). Tighten the fuel tank strap/shield bolts to 25.5 Nm (19 lb. ft.).
4. Connect the EVAP hose at the T-connector (1).
5. Install the tank crossover hose (3).
6. Push the clamps outboard against each fuel tank keeping the clamps parallel with the white stripes on the tank crossover hose. Tighten the tank crossover hose clamps to 4 Nm (35 lb. in.).
7. Remove the caps from the fuel pipes.
8. Connect the fuel sender fuel feed pipe (1) (jet pump to left tank), the fuel return rear pipe (2), and the fuel feed rear pipe (3). Refer to Quick Connect Fittings (Plastic Collar).
9. Connect the fuel sender electrical connector.
10. Connect the fuel system ground strap. Tighten the fuel system ground strap to 8 Nm (71 lb. in.).
11. Connect the fuel fill hose (3) and the vent hose (4). Tighten the fuel fill hose clamp and the vent hose clamp to 4 Nm (35 lb. in.).
12. Install the left rear wheelhouse liner panel.
13. Install the mufflers.
14. Refill the fuel system.
15. Connect the negative battery cable.
16. Inspect for leaks.
16.1. Turn the ignition switch ON for 2 seconds.
16.2. Turn the ignition switch OFF for 10 seconds.
16.3. Turn the ignition switch ON.
16.4. Check for fuel leaks.