Liftgate Calibration (Except Avalanche and EXT Escalade): Notes
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
To ensure proper calibration of the liftgate, the liftgate assembly must be at room temperature during calibration.