Peterbilt 536, 537: Lights and Instruments

Affects Peterbilt 536, 537 · 2021–2023 — about 7 vehicles.

The hazard

Issue: On a small number of trucks, the warning light for the antilock brake system (ABS) doesn't turn on when there is a problem with the ABS. Safety Risk: A driver that is not warned about a problem with the antilock brake system could have an increased risk of a crash. Corrective Actions: PACCAR will notify owners by mail and instruct you to take your truck to a dealership to update the vehicle software.

What to do

Contact your dealer; the remedy details were not included in the filing.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational