CanadaCertain PACCAR medium- and heavy-duty trucks, including 2026 Peterbilt 579 and 2027 Peterbilt T680 and T880 models, are affected; the issue involves the quick-release valve in the trailer air brake connection possibly being installed backwards. The valve fault can cause trailer brakes to not apply or release correctly, making the trailer unstable during braking, and a PACCAR dealer has already repaired the affected trucks by correctly installing the quick-release valve.
How to identify it
2026 Peterbilt 579
2027 Peterbilt T680
2027 Peterbilt T880
The hazard
On certain trucks, the quick-release valve in the trailer air brake connection may have been installed backwards. As a result, the trailer brakes may not apply or release correctly.
Trailer brakes that don't apply or release correctly could make the trailer unstable during braking.
What to do
A PACCAR dealer has already repaired the affected trucks by correctly installing the quick-release valve.
The official notice
This page is a summary of the notice published by Transport Canada, collected from Health Canada, CFIA and Transport Canada. Check the original before you act on it.
Read the official notice (opens in a new tab)