Some Chevrolet 4500, 5500, And 6500 Models Have Loose Suspension Nuts


Almost 6,000 Chevrolet 4500 HD, 5500 HD, and 6500 HD trucks in the U.S. need repairs due to a suspension-related issue.

The National Highway Traffic Safety Administration’s recall notice reveals that Chevrolet 4500 HD, 5500 HD, and 6500 HD models produced between January 18, 2022 and August 12, 2022 have hex flange lock nuts used in various locations in the suspension joints that were not properly formed and heat treated by the supplier.

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Navistar is the manufacturer of impacted models and says that improperly produced nuts could result in joint tension over time, potentially increasing the risk of a crash. Drivers of impacted vehicles may notice a degradation in vehicle handling over time because of the issue.

Navistar began investigating a quality issue in certain hex flange lock nuts used in 2021-2022 Chevrolet Silverado medium duty vehicles on November 18, 2022 and soon decided to conduct a safety recall to address the condition in vehicles that it had produced in the field.

Dealers were notified of the recall on November 23 and owners will be alerted to the recall from January 9, 2023. Dealers will replace suspect lock nuts with ones that are made to Navistar’s specified form and surface hardness.

The issuance of this recall comes four weeks after General Motors announced it was recalling 338,725 full-size SUVs from the 2021 model year because the daytime running lights might not deactivate when the headlights are turned on. To resolve the issue, GM simply made a software update to the Body Control Module.


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