Section 9 (Wheel Alignment Specifications & Procedures): Adjustment: Camber
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1985 GMC Vandura Special, 1985 GMC Vandura, 1985 GMC Rally Camper Special, 1985 GMC Rally, and 1985 GMC Magnavan. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Adding an equal number of shims at both front and rear of cross shaft will decrease positive camber. By adding or subtracting equal amounts of shims, camber may be corrected without affecting caster.
Determine camber angle from alignment machine and adjust as necessary. Camber is changed by adding or subtracting shims from between upper control arm shaft and frame bracket. Adding an equal number of shims at both front and rear of cross shaft will decrease positive camber and vice versa. See Fig 1 . If a normal shim pack will not bring vehicle within specifications, check for damaged control arms and related parts.
Fig 1: Adjusting Caster & Camber By adding or subtracting equal amounts of shims, camber may be corrected without affecting caster.
CAUTION:
Wheel runout must be checked and, if necessary, compensated for before checking and/or adjusting toe-in. Maximum steel wheel radial runout is .040" (1.02 mm) and lateral runout is .045" (1.14 mm). Maximum aluminum wheel radial and lateral runout is .030" (.76 mm). Replace wheel if beyond specifications.