General Motors (GM) will be contacting the owners of certain HD and XD trucks because of a problem affecting the suspension in their vehicles. If the problem is not fixed, it could lead to difficult steering and an increased risk of an accident.

In November 2022, GM received information from one of their suppliers that there was an investigation into a manufacturing quality problem in certain flange lock nuts used in 2021-2022 model year Chevrolet Silverado medium-duty vehicles. After consulting with their supplier, GM’s Safety Field Action Decision Authority (SFADA) decided to conduct a recall.

The vehicles affected include:

2021-2022 Chevrolet 4500HD
2021-2022 Chevrolet 4500XD
2021-2022 Chevrolet 5500HD
2021-2022 Chevrolet 5500XD
2022 Chevrolet 6500HD

According to the defect report, certain hex flange lock nuts used in several locations on the suspension in some HD and XD trucks were not properly formed and heat treated by the supplier. Over time, the nuts could loosen and cause a loss of tension in the suspension joints. Over time, drivers will notice a degradation in vehicle handling.

Parts are not currently available, but when parts are available owners will be asked to return to their dealerships to have the hex flange lock nuts replaced. GM’s number for this recall is N222391080 and the NHTSA campaign number is 22V-874.

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