This vehicle has a semi-independent twist-beam rear suspension system consisting of the following components:
Axle Assembly

The axle assembly (1) attaches to the underbody through a rubber bushing and bracket located at the front of each integral trailing arm.
The brackets are attached to the underbody side rails with bolts (2). The axle structure itself maintains the geometrical relationship of the wheels relative to the centerline of the body.
Special Tools and Equipment

Wheel Stud Replacement
Tires and WheelsRemoval Procedure
Warning: Refer to Approved Equipment for Collision Repair Warning in the
Preface section.
Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface section.
Disable the SIR System. Refer to SIR Disabling and Enabling.
Disconnect the negative battery cable. Refer to Battery N ...
Installation Procedure
Align the rocker inner panel.
Drill 8 mm (5/16 in) for plug welding along the edges of the quarter
outer panel as noted from the original panel.
Clean and prepare the attaching surfaces for welding.
Position the rocker inner panel on the vehicle.
Verify the fit of ...
Connections
OnStar Hands-Free Calling allows calls to be made and received from the vehicle.
The vehicle can also be controlled from a cell phone through the OnStar RemoteLink
mobile app.
For coverage maps, see www.onstar.com (U.S.), www.onstar.ca (Canada).
Hands-Free Calling
1. Press . System responds: ...