Fuel Tank Replacement Utility Single Tank

1. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief .
2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
3. Drain the fuel tank. Refer to Fuel Tank Draining .
4. Remove the evaporative emission (EVAP) canister. Refer to Evaporative Emission Canister Replacement .
5. Disconnect the chassis fuel pipes (2) at the fuel tank pipes (1). Refer to Plastic Collar Quick Connect Fitting Service .
6. Cap the fuel and EVAP pipes in order to prevent possible fuel system contamination.



7. Disconnect the EVAP vent pipe at the fuel tank clip (5).



8. Loosen the vent hose and filler hose clamp (4, 2).
9. Disconnect the vent hose and filler hose from the pipe.



10. With the aid of an assistant, support the fuel tank.

Notice: Do not bend the fuel tank straps. Bending the fuel tank straps may damage the straps.

11. Remove the fuel tank strap attaching bolts.
12. Remove the fuel tank straps.
13. Carefully lower the rear of the fuel tank slightly.
14. Remove the fuel sender cover on the Suburban only.



15. Disconnect the fuel sender and the fuel pressure sensor electrical connectors.
16. Remove the fuel tank.
17. Place the fuel tank in a suitable work area.



18. Remove the fuel feed and return pipes (3) from the fuel sender and the retaining clips.
19. Remove the fuel sender assembly from the fuel tank. Refer to Fuel Sender Assembly Replacement .
20. Remove the EVAP pipe from the fuel tank roll over valves (2, 4) and the retaining clips (1).
21. Remove the fuel fill hose and the vent hose from the fuel tank.

1. Connect the EVAP pipe to the fuel tank roll over valves (2, 4) and the retaining clips (1).
2. Install the fuel sender assembly to the fuel tank. Refer to Fuel Sender Assembly Replacement .
3. Connect the fuel feed and return pipes (3) to the fuel sender and the retaining clips.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Install the fuel fill hose and the vent hose to the fuel tank.

Tighten
Tighten the hose clamps to 2.5 N·m (22 lb in).




5. With the aid of an assistant, support and partially raise the fuel tank front end first.
6. Connect the fuel sender and the fuel pressure sensor electrical connectors.
7. Install the fuel sender cover on the Suburban only.



8. Fully raise the fuel tank.
9. Install the fuel tank straps.
10. Install the fuel tank strap attaching bolts.

Tighten
Tighten the bolts to 40 N·m (30 lb ft).




11. Connect the fuel fill hose and the vent hose to the pipes.

Tighten

•	Tighten the fuel fill hose clamp (2) to 2.5 N·m (22 lb in).

•	Tighten the vent hose clamp (4) to 2.5 N·m (22 lb in).




12. Connect the EVAP vent pipe to the fuel tank clip (5).



13. Remove the caps from the fuel and EVAP pipes.
14. Connect the chassis fuel pipes (2) at the fuel tank pipes (1). Refer to Plastic Collar Quick Connect Fitting Service .
15. Install the EVAP canister. Refer to Evaporative Emission Canister Replacement .
16. Lower the vehicle.
17. Refill the fuel tank.
18. Install the fuel filler cap.
19. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
20. Use the following procedure in order to inspect for leaks:

20.1.

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

20.2.

Turn OFF the ignition for 10 seconds.

20.3.

Turn ON the ignition, with the engine OFF.

20.4.

Inspect for fuel leaks.

21. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical.

Fuel Tank Replacement Utility Dual Tank Front

1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
3. Drain the fuel tank. Refer to Fuel Tank Draining .
4. Remove the evaporative emission (EVAP) canister. Refer to Evaporative Emission Canister Replacement .



5. Disconnect the EVAP vent pipe (3) at the fuel tank clip (5).



6. Loosen the vent hose clamp (7).
7. Disconnect the vent hose (6) from the fuel tank.



8. Disconnect the fuel fill hose (2) from the fuel tank.



9. With the aid of an assistant, support the fuel tank.

Notice: Do not bend the fuel tank straps. Bending the fuel tank straps may damage the straps.

10. Remove the fuel tank strap attaching bolts.
11. Remove the fuel tank straps.
12. Carefully lower the rear of the fuel tank slightly.
13. Remove the fuel sender cover on the suburban only.



14. Disconnect the fuel feed, return, and EVAP pipes (1, 2, 3) at the fuel sender.
15. Disconnect the fuel sender and the fuel pressure sensor electrical connectors.
16. Remove the fuel tank.
17. Place the fuel tank in a suitable work area.



18. Disconnect the EVAP pipe from the fuel tank roll over valves (2, 4) and the retaining clips (1).
19. Remove the fuel sender assembly from the fuel tank. Refer to Fuel Sender Assembly Replacement .
20. Cap the fuel and EVAP pipes in order to prevent possible fuel system contamination.

1. Connect the EVAP pipe to the fuel tank roll over valves (2, 4) and the retaining clips (1).
2. Install the fuel sender assembly to the fuel tank. Refer to Fuel Sender Assembly Replacement .



3. With the aid of an assistant, support and partially raise the fuel tank front end first.
4. Connect the fuel sender and the fuel pressure sensor electrical connectors.
5. Connect the fuel feed, return, and EVAP pipes (1, 2, 3) at the fuel sender.
6. Install the fuel sender cover on the suburban only.



7. Fully raise the fuel tank.
8. Install the fuel tank straps.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

9. Install the fuel tank strap attaching bolts.

Tighten
Tighten the bolts to 40 N·m (30 lb ft).




10. Connect the vent hose (6) to the fuel tank.

Tighten
Tighten the vent hose clamp (7) to 2.5 N·m (22 lb in).




11. Connect the fuel fill hose (2) to the fuel tank.

Tighten
Tighten the fuel fill hose clamp (1) to 2.5 N·m (22 lb in).




12. Connect the EVAP vent pipe to the fuel tank clip (5).



13. Install the EVAP canister. Refer to Evaporative Emission Canister Replacement .
14. Lower the vehicle.
15. Refill the fuel tank.
16. Install the fuel filler cap.
17. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
18. Use the following procedure in order to inspect for leaks:

18.1.

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

18.2.

Turn OFF the ignition for 10 seconds.

18.3.

Turn ON the ignition, with the engine OFF.

18.4.

Inspect for fuel leaks.

19. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical.

Fuel Tank Replacement Utility Dual Tank Rear

1. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief .
2. Lower and remove the under chassis mounted spare tire.
3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
4. Remove the rear crossmember that holds the spare tire.
5. Drain the fuel tank. Refer to Fuel Tank Draining .



6. Disconnect the rear chassis fuel pipe (2) at the fuel sender (1). Refer to Plastic Collar Quick Connect Fitting Service .
7. Disconnect the fuel sender electrical connectors.
8. Disconnect the evaporative emission (EVAP) pipes at the rear tank EVAP pipes (5).
9. Cap the fuel and EVAP pipes in order to prevent possible fuel system contamination.



10. Disconnect the fuel fill pipe ground strap.



11. Loosen the rear tank to front tank fuel fill hose clamp (3).
12. Disconnect the fuel fill hose (2) from the rear fuel tank.



13. With the aid of an assistant, support the fuel tank.

Notice: Do not bend the fuel tank straps. Bending the fuel tank straps may damage the straps.

14. Remove the fuel tank strap attaching bolts.
15. Remove the fuel tank straps.
16. Remove the fuel tank.



17. Place the fuel tank in a suitable work area.
18. Remove the EVAP pipes from the fuel tank roll over valves (1, 3) and the retaining clips (2).
19. Remove the fuel sender assembly from the fuel tank. Refer to Fuel Sender Assembly Replacement .
20. Remove the fuel fill hose from the fuel tank.

1. Connect the EVAP pipe to the fuel tank roll over valves (1, 3) and the retaining clips (2).
2. Install the fuel sender assembly to the fuel tank. Refer to Fuel Sender Assembly Replacement .

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Install the fuel fill hose to the fuel tank.

Tighten
Tighten the hose clamp to 2.5 N·m (22 lb in).




4. Install the fuel tank.
5. Install the fuel tank straps.
6. Install the fuel tank strap attaching bolts.

Tighten
Tighten the bolts to 40 N·m (30 lb ft).




7. Connect the fuel fill hose  (2) to the rear fuel tank.

Tighten
Tighten the fuel fill hose clamp (3) to 2.5 N·m (22 lb in).




8. Connect the fuel fill pipe ground strap.

Tighten
Tighten the fuel fill pipe ground strap bolt to 9 N·m (80 lb in).




9. Connect the vent hose (3) to the vent pipe (1).

Tighten
Tighten the vent hose clamp (2) to 2.5 N·m (22 lb in).




10. Remove the caps from the fuel and EVAP pipes.
11. Connect the EVAP pipes at the rear fuel tank EVAP pipes (5). Refer to Plastic Collar Quick Connect Fitting Service .
12. Connect the fuel sender electrical connectors.
13. Connect the rear chassis fuel pipe (2) to the fuel sende  (1).
14. Install the rear crossmember that holds the spare tire.
15. Lower the vehicle.
16. Install and raise into position the under chassis mounted spare tire.
17. Refill the fuel tank.
18. Install the fuel filler cap.
19. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
20. Use the following procedure in order to inspect for leaks:

20.1.

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

20.2.

Turn OFF the ignition for 10 seconds.

20.3.

Turn ON the ignition, with the engine OFF.

20.4.

Inspect for fuel leaks.

21. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical.