Peterbilt Window Regulator R21-6010 HLK2537

The R21-6010 is the Left-Hand (Driver Side) electric power window regulator for Peterbilt trucks.

Key Specifications

Part Number: R21-6010 (Left-Hand)

Operation: Electric (Power)

Mechanism: Cable-driven (Scissor-less)

Right-Hand Equivalent: R21-6010R

Common Vehicle Fitment

This Peterbilt window regulator is a standard replacement for several modern Peterbilt models, typically from 2010 to 2024:

Peterbilt 389, 388, 386, 384

Peterbilt 367, 365

Peterbilt 587, 579 (Early versions)

Peterbilt 337, 348 (Medium Duty)

Quality and Testing

TinzerMotor produces these window regulators and window motors with a focus on long-term high quality and mechanical reliability:

Heavy-Duty Construction: Uses thickened steel plate components and reinforced pivot points to prevent the "sagging" or jamming common in lower-quality aftermarket parts.

Extensive Testing: Each unit undergoes rigorous cycle testing, involving thousands of manual rotations under simulated glass weight to ensure the internal gears do not strip or slip over time.

Precision Fit: Designed to align perfectly with the original door mounting holes, ensuring a "bolt-on" installation without the need for drilling or modification.

Please contact: 

Ms Riva  

Wechat/WhatsApp +86 15355970956 

Email: riva@ruishuoautoparts.com

Alibaba Shop linkage:

Peterbilt Window Regulator R21-6010 HLK2537