LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1981 >> Magnavan Standard Trans >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Windows - Tailgate >> Removal & Installation >> Jackscrew Regulator
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Jackscrew Regulator

CAUTION: If window glass is removed, or disengaged from regulator lift arms, the regulator lift arms must be secured before removing jackscrew. Regulator lift arms are under spring pressure and may cause injury if not secured.
  1. Drill an 1/8" hole through sector gear and back plate, and install a sheet metal screw in hole to secure sector gears in position.
  2. Disconnect drive cable at jackscrew. Remove regulator jackscrew attaching screws and remove jackscrew assembly. To install, reverse removal procedures.