Dorman 742-140 Power Window Motor - Front Left, Front Right or Rear Right

Reliable Window Motor Replacement for Select GM Vehicles

The Dorman 742-140 window motor is designed to restore smooth and efficient power window operation in various Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac, and Saturn models. This plug-in motor includes a wiring harness and window lift gear for straightforward installation and reliable performance.

• Compatible with multiple GM vehicles including Chevrolet Tahoe, Cadillac Escalade, Buick LeSabre, and GMC Sierra
• Plug-in design with included wiring harness for easy connection
• Window lift gear included for complete motor functionality
• Does not include regulator or mounting hardware
• Part number 742-140 ensures correct fitment and quality

Product Features and Specifications

The Dorman 742-140 window motor is engineered without embedded logic control, focusing on direct mechanical operation. It comes with a wiring harness and window lift gear, but mounting hardware and regulator are not included, so these components must be reused or purchased separately. The plug-in wiring harness simplifies installation by matching factory connectors, reducing the need for splicing or modifications. This motor is designed for use in a wide range of GM trucks, SUVs, and sedans, including models such as the Chevrolet C1500, Cadillac DeVille, Buick Roadmaster, and Pontiac Grand Prix.

Common Applications and Problem Resolution

• Restores power window function when the motor fails or becomes unresponsive
• Eliminates window operation noise caused by worn lift gears
• Replaces motors with damaged or corroded wiring harnesses
• Solves intermittent window movement or slow operation issues
• Addresses power window failure in vehicles like the GMC Yukon and Oldsmobile Cutlass

Installation Notes and Tips

Installation of the Dorman 742-140 window motor requires removal of the door panel and disconnection of the old motor and wiring harness. Since mounting hardware and regulator are not included, retain the original parts or acquire replacements as needed. The plug-in wiring harness included with this motor matches factory connectors, allowing for a direct and secure connection. Verify compatibility with your specific vehicle model and year before installation to ensure proper fitment.

Quality Assurance and Warranty Information

Dorman window motors undergo quality testing to meet OEM standards for durability and performance. The 742-140 part number is backed by Dorman's limited warranty, which covers defects in materials and workmanship. This warranty provides assurance of product reliability when installed according to manufacturer guidelines.