Section 5 (Wheel Alignment Specifications & Procedures): Adjustment: Notes
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1984 GMC Vandura Special, 1984 GMC Vandura, 1984 GMC Value Van, 1984 GMC Rally Camper Special, and 1984 GMC Rally. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Difference in shim packs must not exceed .30" (7.62 mm). Front shim pack must be .10" (2.54 mm) minimum.