Crossmember Replacement Lower Control Arm

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the underbody shields. Refer to Catalytic Converter Guard Replacement .
3. Support the front differential.



4. Remove the differential mounting nut, bolt, and washer . Refer to Differential Carrier Assembly Replacement .



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).

Notice: Refer to Fastener Notice in the Preface section.

3. Install the bolts and the nuts.

Tighten
Tighten the nuts to 90 N·m (66 lb ft).

4. Remove the differential support.



5. Install the differential mounting nut, bolt, and washer. Refer to Differential Carrier Assembly Replacement .
6. Install the underbody shields. Refer to Catalytic Converter Guard Replacement .
7. Lower the vehicle.