WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Upper Steering Column With Tilt Lever
Courtesy of GENERAL MOTORS CORP.
Align the tilt steering column lever (1) and push the lever into the steering column (2).