2023–2024 Mack Anthem (an), 2023–2024 Mack Granite (GR), 2023–2024 Mack LR and 1 other model Recall: Engine may not return to idle within 2 seconds if the accelerator pedal…
NHTSA campaign 23V792000 · Vehicle Speed Control · filed Nov 22, 2023 · verified Jul 30, 2026
The defect
Mack Trucks, Inc. (Mack) is recalling certain 2023-2024 GR, AN, LR, and Terrapro vehicles. The engine may not return to idle within 2 seconds if the accelerator pedal position sensor becomes disconnected. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 124, "Accelerator Control Systems."
The risk
An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
Mack will replace the throttle pedal and update the vehicle software, free of charge. Owner letters were mailed February 27, 2024. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0455.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Affected vehicles
Related recalls
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Other campaigns involving Mack vehicles
Source: NHTSA recall database, campaign 23V792000 (manufacturer number SC0455). Data last verified Jul 30, 2026.