Chevrolet 4500HD, 5500XD +3 more: Equipment

Affects Chevrolet 4500HD, 5500XD, 4500XD, 6500HD, 5500HD · 2021–2022 — about 6K vehicles.

The hazard

Broken hex flange lock nuts may cause a loss of tension, leading to steering instability, and increasing the risk of a crash.

What to do

Dealers will replace the hex flange lock nuts as necessary, free of charge. Interim owner notification letters informing owners of the safety risk were mailed December 27, 2022. Owner notification letters were mailed February 10, 2023. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N222391080.

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