Removal Procedure
- Open hood.
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WARNING: 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.
For Vehicles equipped with OnStar® (UE1) with Back Up Battery:
The Back Up Battery is a redundant power supply to allow limited OnStar® functionality in the event of a main vehicle battery power disruption to the VCIM (OnStar®module). Do not disconnect the main vehicle battery or remove the OnStar® fuse with the ignition key in any position other than OFF. Retained accessory power (RAP) should be allowed to time out or be disabled (simply opening the driver door should disable RAP) before disconnecting power. Disconnecting power to the OnStar® module in any way while the ignition is On or with RAP activated may cause activation of the OnStar® Back-Up Battery (BUB) system and will discharge and permanently damage the back-up battery. Once the Back-Up Battery is activated it will stay on until it has completely discharged. The BUB is not rechargeable and once activated the BUB must be replaced.Turn the ignition OFF.
- Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECTION AND CONNECTION .
- Relieve the fuel system pressure. Refer to FUEL PRESSURE RELIEF .
- Raise and support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE .
- Drain the fuel tank. Refer to FUEL TANK DRAINING .
- Remove the propeller shaft. Refer to PROPELLER SHAFT REPLACEMENT .
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WARNING: Do not breathe the air through the EVAP component tubes or hoses. The fuel vapors inside the EVAP components may cause personal injury.
Disconnect the fuel tank filler vent pipe quick connector (1) from the fuel tank filler vent pipe (2). Refer to PLASTIC COLLAR QUICK CONNECT FITTING SERVICE .
- Remove the fuel tank filler hose fastener (3).
- Remove the fuel tank filler hose (4).
- Disconnect the evaporative emission front pipe quick connector from the evaporative emission front pipe (1). Refer to PLASTIC COLLAR QUICK CONNECT FITTING SERVICE .
- Disconnect the fuel feed front pipe quick connector from the fuel feed front pipe (2). Refer to PLASTIC COLLAR QUICK CONNECT FITTING SERVICE .
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NOTE: Do NOT remove the rear axle.
Loosen both front fasteners of the rear axle. Lower the rear axle to 20 mm (0.8 in). Refer to REAR AXLE REPLACEMENT (G96)REAR AXLE REPLACEMENT (WITHOUT G96) .
- Position a suitable hydraulic lift below the fuel tank.
- Remove both fuel tank strap fasteners (1).
- Remove both fuel tank straps from the fuel tank (2).
- With the aid of an assistant, lower the hydraulic lift to remove the fuel tank from the vehicle.
- Disconnect both fuel tank fuel pump module wiring harness connectors (1) from the fuel tank fuel pump modules.
- Remove the fuel tank from the hydraulic lift.