Mack Recalls Trucks Over Increased Crash Risk Due to Possible Rear Suspension and ESC Failure

Allentown, PA – Mack Trucks, Inc. is recalling certain Mack Anthem, Granite and Pinnacle heavy duty trucks due to an issue that causes affected models to drift out of its lane.

In documents submitted to the National Highway Traffic Safety Administration (NHTSA), Mack stated the affected units may not stay in their lane at “certain speeds,” thus increasing the risk of a crash.


The truck maker did not specify at the speeds at which the increased risks are associated.

The models affected are 2018-2022 Mack Anthem (AN), Granite (GR/GU), and Pinnacle (CHU/CXU/PI) vehicles equipped with “camelback” rear suspension and electronic stability control.

The total number of trucks affected is 566.

According to documents submitted to NHTSA, Mack first identified the problem in February 2020.

An investigation was opened and lasted through March 2021.

The recall is expected to begin May 21, 2021.


Mack will notify owners, and dealers will reprogram the vehicle control units, free of charge.

Owners may contact Mack customer service at 1 (800) 866-1177.

Mack’s number for this recall is SC0423.

Read more about this recall on NHTSA’s website HERE.

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