Dorman 740-387 Window Regulator - Rear Right

Reliable Manual Window Regulator for Chevrolet and GMC Trucks

The Dorman 740-387 manual window regulator is designed to restore smooth window operation in select Chevrolet and GMC trucks. Engineered with durable materials, this regulator provides a dependable solution for manual window systems without a motor.

• Compatible with Chevrolet Cheyenne, Silverado 1500, 2500, 2500 HD, 3500 HD and GMC Sierra 1500, 2500 HD, 3500 HD models
• Manual window operation type without motor included
• Durable metal and plastic frame construction for strength and longevity
• Plastic gear material designed for smooth gear engagement
• Bolt-on attachment type for secure mounting
• Includes one manual window regulator (regulator only), no mounting hardware or installation instructions included

Product Details and Construction

The Dorman 740-387 window regulator features a combination of metal and plastic frame materials to balance durability and weight. The plastic gear ensures consistent, smooth operation of the window mechanism while reducing noise and wear. This part is designed specifically for manual window systems and does not include a motor or wiring, making it suitable for vehicles equipped with manual crank windows. The bolt-on attachment type allows for a secure fitment in the door assembly of compatible Chevrolet and GMC trucks.

Compatible Vehicles and Applications

This manual window regulator is compatible with a range of Chevrolet and GMC trucks, including the Chevrolet Cheyenne, Silverado 1500, Silverado 2500, Silverado 2500 HD, Silverado 3500 HD, and GMC Sierra 1500, Sierra 2500 HD, Sierra 3500 HD. It is intended for use in vehicles with manual window operation systems, providing a direct replacement for worn or damaged window regulators.

• Restores manual window functionality in Chevrolet Silverado and GMC Sierra trucks
• Replaces broken or worn window regulators causing window sticking or failure
• Eliminates window noise or rough operation due to damaged gears
• Addresses window alignment issues caused by faulty regulator components
• Prevents window from falling inside the door panel

Installation Notes and Tips

Installation of the Dorman 740-387 manual window regulator requires removal of the door panel and careful handling of the window glass. Since mounting hardware and installation instructions are not included, it is recommended to retain original hardware or source compatible bolts for installation. Proper alignment of the regulator and window glass is essential to ensure smooth operation. Professional installation is advised if unfamiliar with door panel disassembly or window regulator replacement.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. While specific warranty details for part number 740-387 are not provided, Dorman typically offers limited warranties covering defects in material and workmanship. Using this manual window regulator helps maintain the integrity of your Chevrolet or GMC truck’s window system with reliable performance.