Frame and Underbody: Removal & Installation Hummer H2 I

Removal Procedure

1. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-187252-S32674187102005083100000) in General Information.
2. Support the transmission with a suitable stand or jack.
3. Remove the nuts retaining the transmission mount to the transmission support.
4. Raise the transmission.
5. Remove the bolts and the nuts retaining the transmission support to the frame.
6. Remove the transmission support from the frame.

Installation Procedure

1. Install the transmission support to the frame.
2. Install the bolts and the nuts in order to retain the transmission support to the frame. Tighten: Tighten the nuts to 95 N.m (70 lb ft).
3. Lower the transmission.
4. Align the transmission mount with the transmission support.
5. Install the nuts to the transmission mount. Tighten: Tighten the nuts to 40 N.m (30 lb ft).
6. Remove the stand or jack.
7. Lower the vehicle.

1. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-187252-S32674187102005083100000) in General Information.
2. Remove the underbody shields. Refer to «Catalytic Converter Guard Replacement»(ref-187245-S04691823662005083100000) .
3. Support the front differential.
4. Remove the differential mounting nut, bolt, and washer. Refer to «Differential Carrier Assembly Replacement»(ref-187253-S32729587392005083100000) in Front Drive Axle.
5. Remove the crossmember mounting bolts.
6. Remove the crossmember from the vehicle.

1. Install the crossmember to the vehicle.
2. Perform the following procedure before installing the bolts. Remove all traces of the original adhesive patch. Clean the threads of the bolt with denatured alcohol or equivalent and allow to dry. Apply Threadlocker GM P/N 12345493 (Canadian P/N 10953488).
3. Install the bolts and the nuts. Tighten: Tighten the nuts to 120 N.m (89 lb ft).
4. Remove the differential support.
5. Install the differential mounting nut, bolt, and washer. Refer to «Differential Carrier Assembly Replacement»(ref-187253-S32729587392005083100000) in Front Drive Axle.
6. Install the underbody shields. Refer to «Catalytic Converter Guard Replacement»(ref-187245-S04691823662005083100000) .
7. Lower the vehicle.

Support the frame with the hoist when you change the body mounts. If only one mount is changed loosen and lower the entire side on which the mount in question is being replaced.

1. Raise the vehicle on a hoist. Refer to «Lifting and Jacking the Vehicle»(ref-187252-S32674187102005083100000) in General Information.
2. Using jack stands or the equivalent to support the body where the mounts will be replaced.
3. Remove the body mount bolt, retainer, and lower cushion at the radiator support.
4. Remove the body mount bolt, retainers, and lower cushions at the front mount location.
5. Remove the body mount bolt, retainers, and lower cushions at the three other mount locations.
6. Remove the body mount bolt, retainers, and lower cushion at the rear most mount.
7. Disconnect or remove any wiring harness or component that may interfere with the lowering of the frame.
8. Lower the hoist in order to leave the body supported by the jack stands.
9. Remove the upper cushions and the shims from the vehicle.

1. Install the upper cushions and the shims to the vehicle.
2. Raise the hoist to allow the body mount bolts to be installed.
3. Connect or install any wiring harness or component that was removed to allow for the lowering of the frame.
4. Install the body mount bolt, retainer, and lower cushion at the rear most mount.
5. Install the body mount bolt, retainers, and lower cushions at the three other mount locations.
6. Remove the body mount bolt, retainers, and lower cushions at the front mount location.
7. Install the body mount bolt, retainer, and lower cushion at the radiator support. Tighten: Tighten the bolts to 85 N.m (63 lb ft).
8. Remove the jack stands.
9. Lower the vehicle.

1. Remove the bumper. Refer to «Bumper Replacement - Front»(ref-187244-S06855631152005083100000) in Bumpers.
2. Remove the winch receiver bolts from the frame.
3. Remove the winch receiver from the vehicle.

1. Install the winch receiver to the vehicle.
2. Install the receiver bolts to the frame. Tighten: Tighten the bolts to 85 N.m (63 lb ft).
3. Install the bumper. Refer to «Bumper Replacement - Front»(ref-187244-S06855631152005083100000) in Bumpers.

1. Remove the bumper. Refer to «Bumper Replacement - Rear»(ref-187244-S20935792692005083100000) in Bumpers.
2. Remove any electrical or air suspension components from the hitch.
3. Remove the hitch bolts from the frame.
4. Remove the hitch from the vehicle.

1. Install the hitch to the vehicle.
2. Install the hitch bolts to the frame. Tighten: Tighten the bolts to 100 N.m (74 lb ft).
3. Install the electrical or air suspension components to the hitch.
4. Install the bumper. Refer to «Bumper Replacement - Rear»(ref-187244-S20935792692005083100000) in Bumpers.

1. Remove the front bumper. Refer to «Bumper Replacement - Front»(ref-187244-S06855631152005083100000) in Bumpers.
2. Remove the tow hook bolts from the frame rail.
3. Remove the tow hook from the vehicle.

1. Install the tow hook to the frame rail.
2. Install the bolts to the tow hook through the frame rail. Tighten: Tighten the bolts to 85 N.m (63 lb ft).
3. Install the front bumper. Refer to «Bumper Replacement - Front»(ref-187244-S06855631152005083100000) in Bumpers.

1. Remove the D-Ring mounting bolts.
2. Remove the D-Ring.

1. Install the D-Rings to the vehicle.
2. Install the D-Ring mounting bolts. Tighten: Tighten the bolts to 85 N.m (63 lb ft).

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-187252-S32674187102005083100000) in General Information.
2. Remove the assist step if equipped. Refer to «Assist Step Replacement (Tubular BVE)»(ref-187245-S31803312552005083100000) or «Assist Step Replacement (Removable U Step)»(ref-187245-S06444366342005083100000) .
3. Remove the EVAP canister vent valve bracket. Refer to «Evaporative Emission (EVAP) Canister Vent Solenoid Valve Replacement»(ref-187222-S12549380232005083100000) in Engine Controls.
4. Remove the mounting bolts.
5. Remove the rocker panel protector from the vehicle.

1. Install the rocker panel protector to the vehicle.
2. Loosely install all of the mounting bolts. Tighten: Tighten the bolts to 50 N.m (37 lb ft).
3. Install the EVAP canister vent valve bracket. Refer to «Evaporative Emission (EVAP) Canister Vent Solenoid Valve Replacement»(ref-187222-S12549380232005083100000) in Engine Controls.
4. Install the assist step if equipped. Refer to «Assist Step Replacement (Tubular BVE)»(ref-187245-S31803312552005083100000) or «Assist Step Replacement (Removable U Step)»(ref-187245-S06444366342005083100000) .
5. Lower the vehicle.

1. Remove the nuts and the bolts.
2. Remove the assist step from the vehicle.

1. Perform the following procedure before installing the bolts. Remove all traces of the original adhesive patch. Clean the threads of the bolt with denatured alcohol or equivalent and allow to dry. Apply Threadlocker GM P/N 12345382 (Canadian P/N 10953489).
2. Install the assist step to the vehicle. An assistant may be necessary for this step.
3. Install the nuts and the bolts. Tighten: Tighten the nuts to 50 N.m (39 lb ft).

1. Remove the securing knob.
2. Remove the step from the vehicle.

1. Install the step to the vehicle.
2. Install the securing knob and hand tighten.

1. Remove the frame to the shield bolts.
2. Remove the shield from the vehicle.

1. Install the shield to the vehicle.
2. Install the shield to frame bolts. Tighten: Tighten the bolts to 30 N.m (22 lb ft).

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-187252-S32674187102005083100000) in General Information.
2. Remove the engine protection shield. Refer to «Engine Protection Shield Replacement»(ref-187245-S20847574952005083100000) .
3. Remove the mounting bolts.
4. Remove the guard from the vehicle.

1. Install the guard to the vehicle.
2. Install the mounting bolts. Tighten: Tighten the bolts to 30 N.m (22 lb ft).
3. Install the engine protection shield. Refer to «Engine Protection Shield Replacement»(ref-187245-S20847574952005083100000) .
4. Lower the vehicle.