How To Replace Power Window Regulator 99-06 GMC Sierra

Difficulty: Intermediate · About 120 min · Gmc Sierra

Replace a power window regulator on a 1999–2006 GMC Sierra by taping the glass in place, transferring the motor connection, and confirming the window travels smoothly before refitting the door trim.

Steps

1. Remove the door panel

   Release the lock button and mirror sail trim, then remove the door-handle and pull-handle trim. Remove the panel fasteners, lift the panel away, and unplug the switch and courtesy-light connectors.

2. Move the door handle and water shield

   Release the latch rod clip and disconnect the rod from the handle. Remove the handle retaining bolt, slide the handle out, and peel the water shield back carefully so it can be resealed later.

3. Secure the glass and remove the regulator

   Raise the glass and hold it firmly with painter's tape across the door frame. Remove the regulator and glass mounting bolts, unplug the motor, separate the glass from the regulator, and guide the assembly out through the access opening.

4. Install the replacement regulator

   Guide the new regulator into the door and hang it by one mounting bolt. Install the remaining fasteners, lower the glass onto the regulator, reconnect the motor lead, and remove the tape only after the glass is supported securely.

5. Reconnect the handle and water shield

   Restore the water shield seal, slide the handle into place, and reconnect the latch rod and its retaining clip. Tighten the handle fastener and verify the rod moves freely before closing the panel.

6. Test the window and refit the panel

   Reconnect the window switch temporarily and run the glass through its travel, checking for smooth movement and correct alignment. Disconnect it again if needed, refit the door panel and trim, reconnect all wiring, and test once more.

Check your vehicle’s repair manual for exact specifications and fit.