Peterbilt cross member mounted Hill Start Assist valve assembly may have insufficient clearance to the rear axle, causing damage to the rear brake hose and loss of the rear brake signal.
The short version
PACCAR Incorporated reported a problem with the foundation components hoses, lines/piping, and fittings. Here is what owners need to know.
The cross member mounted Hill Start Assist valve assembly may have insufficient clearance to the rear axle, causing damage to the rear brake hose and loss of the rear brake signal.
If loss of the rear brake signal occurs, the vehicle could experience reduced rear braking capability or loss of brakes to the rear axle(s), increasing the risk of a crash.
Take it to a dealer — they will inspect for clearance and re-work the assembly to conform with an updated design, free of charge.
Affected vehicles
These model years are included in NHTSA campaign 21V-648.
| YEAR RANGE | MODEL |
|---|---|
| 2021–2022 | Peterbilt 367 |
| 2021–2022 | Peterbilt 389 |
| 2021–2022 | Peterbilt 567 |
| 2021–2022 | Peterbilt 579 |
What changed
Newest first. The record shows both when the recall began and what has changed since.
- Recall reported to NHTSA. LATEST
Drive one of these? Check your VIN to see if your specific vehicle is affected.
Check your VINWhat this record means
Data from the NHTSA recall database. A clean VIN check means no open federal recalls for that vehicle — not that it never had one.
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MyAutoRecalls is not affiliated with PACCAR Incorporated or the National Highway Traffic Safety Administration.