NHTSA Recall 21V233000: Software (electronic stability control (esc))
Mack Trucks, Inc. reported this safety recall to NHTSA on , covering an estimated 557 vehicles. It affects 6 models including the Mack Anthem (an).
| NHTSA campaign | 21V233000 |
|---|---|
| Manufacturer campaign | SC0423 |
| Component | ELECTRONIC STABILITY CONTROL (ESC) › CONTROL MODULE › SOFTWARE |
| Report received | April 1, 2021 |
| Owner notification | April 21, 2021 |
| Initiated by | Manufacturer |
Defect
Mack Trucks, Inc. (Mack) is recalling certain 2018-2022 Anthem (AN), Granite (GR/GU), and Pinnacle (CHU/CXU/PI) vehicles equipped with "camelback" rear suspension and electronic stability control. The vehicles may not stay in their lane at certain speeds. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 136, "Electronic Stability Control Systems on Heavy Vehicles."
Safety risk
A vehicle that drifts out of its lane increases the risk of a crash.
Remedy
Mack will notify owners, and dealers will reprogram the vehicle control units, free of charge. The recall began on April 21, 2021. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0423.
Notes
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.safercar.gov.
Vehicles covered by recall 21V233000
| Make and model | Model years |
|---|---|
| Mack Anthem (an) | 2018, 2019, 2020, 2021, 2022 |
| Mack Granite (gr) | 2018, 2019, 2020, 2021, 2022 |
| Mack Granite (gu) | 2018, 2019, 2020, 2021, 2022 |
| Mack Pinnacle (chu) | 2018, 2019, 2020, 2021, 2022 |
| Mack Pinnacle (cxu) | 2018, 2019, 2020, 2021, 2022 |
| Mack Pinnacle (pi/pn) | 2018, 2019, 2020, 2021, 2022 |
Being listed here means the campaign covers the model year, not that every car was built with the defect or is still unrepaired. Enter your VIN above to check your specific vehicle. Recall repairs are free at authorised dealers. Source: NHTSA, October 2026.