WAI WPR4878LMB Window Motor and Regulator Assembly - Rear Left

Rear Left Window Motor and Regulator Assembly

WAI WPR4878LMB is a rear left window motor and regulator assembly for vehicles with 7 passenger seating. It is built for direct replacement service on select Chevrolet, GMC, and Isuzu applications, including Trailblazer, Envoy XL, Envoy XUV, and Ascender models.

• Fits 2002-2006 Chevrolet Trailblazer, rear left, w/ 7 Passenger Seating
• Fits 2002-2006 Chevrolet Trailblazer EXT, rear left, w/ 7 Passenger Seating
• Fits 2002-2006 GMC Envoy XL, rear left, w/ 7 Passenger Seating
• Fits 2004-2005 GMC Envoy XUV, rear left, w/ 7 Passenger Seating
• Fits 2003-2005 Isuzu Ascender, rear left, w/ 7 Passenger Seating

Key Features

• WAI window motor and regulator assembly for rear left door service
• Direct-fit replacement for select 7 passenger seating configurations
• Application-specific coverage for Chevrolet Trailblazer and Trailblazer EXT
• Also fits GMC Envoy XL, GMC Envoy XUV, and Isuzu Ascender
• Part number WPR4878LMB for catalog and service matching

Detailed Description

WPR4878LMB is a replacement window motor and regulator assembly for the rear left position on select mid-size SUVs. It serves the power window system in 2002-2006 Chevrolet Trailblazer and Trailblazer EXT, 2002-2006 GMC Envoy XL, 2004-2005 GMC Envoy XUV, and 2003-2005 Isuzu Ascender models equipped with 7 passenger seating. Use WPR4878LMB when the rear left window no longer moves correctly, binds during travel, or stops responding to switch input.

Common Repair Uses

• Rear left power window will not raise or lower
• Window movement is slow, uneven, or noisy
• Regulator mechanism has failed or lost alignment
• Motor no longer responds to the window switch
• Restoring rear left window operation on Trailblazer, Envoy, or Ascender models

Installation Notes and Tips

Verify the rear left position and 7 passenger seating configuration before ordering. Confirm connector style, mounting points, and glass alignment against the original unit. For best results, inspect the window tracks, guides, and switch operation during installation. WPR4878LMB is listed for the rear left door on the exact vehicle applications shown above.

Quality Assurance

WAI supplies electrical and body components for automotive repair applications. Part number WPR4878LMB is cataloged for direct application matching on the listed Chevrolet, GMC, and Isuzu vehicles.