Dorman Heavy-Duty Door Check Strap for Peterbilt 357/377/379/378 (1987–2005) — Durable OEM-Style Replacement

Dorman 924-5401 is a heavy-duty door check strap engineered to replace the original strap on specific Peterbilt models, restoring controlled door movement and lasting durability.

This replacement door check strap is built to mirror the fit and function of factory units used on select Peterbilt trucks. Designed for straightforward installation and reliable daily service, the part helps prevent overextension, reduces door sag, and returns the door to consistent stopping positions. Before you buy, confirm your exact vehicle year and trim using the garage fitment tool to guarantee compatibility.

Which Peterbilt models and years does this door check fit?

The Dorman 924-5401 is compatible with several classic Peterbilt models across specific production years. It covers common heavy-duty rigs where the original strap designs are prone to wear over time, so checking your truck’s year and trim is essential.

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

How does the Dorman check strap restore door performance?

This replacement strap is engineered to match the original geometry so it returns the door to intended stop points and prevents uncontrolled swings. The strength of the materials resists stretching and wear, restoring predictable door operation after the factory strap fails.

• Direct replacement design preserves original door travel and stop locations
• Strong construction reduces sagging and accidental overextension
• Restores consistent door positions for safer entry and exit

What are the material and quality benefits of this heavy-duty kit?

Dorman emphasizes durable materials and manufacturing that meet the needs of heavy-duty truck use. The kit is produced with components selected for longevity under repeated cycles, and it is supported by Dorman’s product team and decades of aftermarket expertise.

• Durable components designed for repeated opening and closing cycles
• Manufacturing quality intended for long service life in heavy-duty environments
• Backed by Dorman’s technical resources and automotive replacement experience

How do I confirm fitment and install the replacement strap?

Use the vehicle garage tool to verify your make, model and trim before ordering to ensure exact fit. Installation is typically straightforward for a technician or experienced DIYer, and the part is intended to match original mounting points to simplify replacement.

• Enter your truck’s year, model and trim in the fitment tool for confirmation
• Designed to align with original mounting holes for easier installation
• Installation often completed with basic hand tools by a qualified technician

Who this is for: This door check strap is aimed at owners, fleet maintenance teams, and roadside technicians who operate or service Peterbilt 357, 377, 378 and 379 trucks within the listed years. If your truck shows door sag, uncontrolled swings or a failed strap, the Dorman 924-5401 provides a durable, direct-replacement option to restore everyday door control and safety. Always confirm your vehicle fitment with the garage tool before purchase.