All Other Models
WARNING: This page does not describe the selected car, but rather 24 other vehicles, including the 1987 GMC Vandura Special, 1987 GMC Vandura, 1987 GMC Suburban, 1987 GMC Safari, and 1987 GMC S15 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Remove glove box and door. Loosen cable attaching screw at selector duct assembly. Make sure cable is installed in bracket on selector duct assembly. Place temperature selector lever in full COLD" position and hold while tightening cable attachment screw.