TechPro GM1550129 Window Regulator - Rear Left

Rear Left Window Regulator for GM Trucks and SUVs

Restore smooth rear window operation with this TechPro window regulator and motor assembly. Built for factory-style precision, it is made to match the original fit and function on select Cadillac, Chevrolet, and GMC applications, including the rear left door on Silverado, Sierra, Suburban, Yukon XL, and Escalade models.

• Regulator and motor assembly for the rear left door
• Factory-style precision for direct-fit replacement
• High-quality materials for durability and consistent operation
• Helps restore the original appearance of the door panel and window system
• Part number GM1550129 for ordering and identification

Detailed Product Overview

TechPro GM1550129 is a rear left window regulator designed for vehicles that use a regulator and motor assembly. It is built to match OE-style dimensions and mounting points, helping maintain proper window travel and alignment. This part cross-references OEM 20945140 for the same application. Compatible With 2007-2014 Cadillac Escalade ESV, rear left; 2007-2014 Chevrolet Silverado 2500 HD, rear left; 2007-2014 Chevrolet Silverado 3500 HD, rear left; 2007-2014 Chevrolet Suburban 1500, rear left; 2007-2014 GMC Sierra 2500 HD, rear left; 2007-2014 GMC Sierra 3500 HD, rear left; 2007-2014 GMC Yukon XL 1500, rear left; 2007-2013 Cadillac Escalade EXT, rear left; 2007-2013 Chevrolet Avalanche, rear left; 2007-2013 Chevrolet Silverado 1500, rear left; 2007-2013 Chevrolet Suburban 2500, rear left; and 2007-2013 GMC Sierra 1500, rear left. The TechPro GM1550129 is a practical replacement when the original rear window mechanism no longer operates correctly.

Common Problems This Part Can Address

• Rear window stuck in the open or closed position
• Slow, uneven, or noisy window movement
• Window dropping inside the door
• Failure of the regulator or motor assembly
• Loss of proper rear left window alignment

Installation Notes and Tips

Verify the rear left door application before installation and compare the original part number, mounting points, and connector style to GM1550129. This regulator and motor assembly is intended for direct replacement use on the listed Cadillac Escalade ESV, Chevrolet Silverado, Chevrolet Suburban, GMC Sierra, and GMC Yukon XL applications. Confirm door trim removal procedures and window glass alignment during installation to help ensure proper operation.

Quality Assurance

TechPro builds this window regulator with durable materials and factory-style precision to support reliable operation and a clean OE-like fit. The part number GM1550129 is identified for the rear left door application and cross-references OEM 20945140.