Z Height Adjustment

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Torsion Bar Suspension Adjuster Bolt

Courtesy of GENERAL MOTORS COMPANY

For vehicles equipped with a torsion bar suspension, turn the bolt (1) that contacts the torsion bar adjusting arm as needed.
For vehicles without torsion bars, replace worn or damaged components as necessary.