Buy OEM 2003 GENERAL MOTORS Part # 25885884 (15901326). Window Regulator (Rear). EXT CAB, w/power. Window Regulator - Repair or Replace A failed window regulator can cause your power window

Regulator.
A mechanical assembly that moves the window up and down. It can be controlled by a motor or manual crank. Power Operated. ASSEMBLY - Side Window. Guide. Liftgate Window. Manual. Power. Sliding Window. Tailgate Window.

Window Regulator

Fits Sierra 1500, Sierra 2500 HD, Sierra 3500 HD, Silverado

EXT CAB, w/power.
Window Regulator - Repair or Replace
A failed window regulator can cause your power window to get stuck, make a grinding noise, or make your window appear to be off track. Consider replacing the window regulator on your 2003 .