Dorman Heavy Duty Door Check Kit for Peterbilt 357/377/378/379 — Direct-Fit Replacement, Durable Strap

The Dorman 924-5401 Heavy Duty Door Check Kit is a direct-replacement door check strap engineered to restore secure door positioning and long-lasting reliability on compatible Peterbilt models.

If your Peterbilt door swings too freely, won’t hold an open position, or the original strap has frayed, this heavy-duty replacement is built to bring back the factory-like control. Dorman designed this kit to match the original part’s fit and function so you can reinstall without modification. It’s offered for a range of classic Peterbilt cabs; confirm fitment for your exact year and trim using the vehicle tool before ordering.

Which Peterbilt models and years does this kit fit?

This replacement strap is engineered for specific Peterbilt trucks and model years. It covers multiple late-1980s and early-1990s models as well as select early-2000s models, so verify compatibility against your VIN or trim selection before purchase.

• Peterbilt 357: model years 1987–1996
• Peterbilt 377: model years 1987–1996
• Peterbilt 378: model years 1987–1988
• Peterbilt 379: model years 2003–2005

How does the Dorman 924-5401 improve door performance?

Installed in place of a worn or broken original strap, this check kit restores the door’s controlled movement and detent positions. It resists wear and provides consistent operation so doors hold open or closed as intended.

• Replaces failing straps that allow uncontrolled door swing
• Restores defined open and closed stop points
• Durable materials reduce the need for frequent replacement

What are the build and quality highlights of this replacement strap?

The part is manufactured with durable components to handle heavy-duty truck use. Dorman applies its aftermarket expertise and testing to deliver reliable performance intended to mirror the original equipment’s behavior.

• Quality construction for prolonged service life
• Designed to match original fit and mounting locations
• Backed by Dorman’s automotive product development experience

How do I make sure this part will fit my truck?

Because model-year, trim, and factory options can affect fitment, use the vehicle selection/garage tool provided on the product page. Enter your make, model, year, and trim to confirm this kit matches your truck before ordering.

• Verify year and model against the compatibility list above
• Use VIN or trim selection in the fitment tool for accuracy
• Contact customer support if you need help confirming fit

Who is this for: The Dorman 924-5401 Heavy Duty Door Check Kit is intended for owners and technicians working on compatible Peterbilt 357, 377, 378, and 379 cabs who want a direct-replacement strap that restores proper door control. It’s suitable for fleet maintenance, owner-operators maintaining an older rig, and repair shops that need a durable, OEM-style fix without modifying mounting points.