NHTSA recall 21V233000
A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.
| Published by | NHTSA (United States) |
|---|---|
| Campaign number | 21V233000 |
| Manufacturer's number | SC0423 |
| Manufacturer | Mack Trucks, Inc. |
| Reported | 2021-04-01 |
| Owners notified | 2021-04-21 |
| Component | ELECTRONIC STABILITY CONTROL (ESC):CONTROL MODULE:SOFTWARE |
| Units potentially affected | 557 |
| Part numbers | Not applicable |
| Report | Annual report 3, for 2025 quarter 2 to 2026 quarter 1 |
|---|---|
| Filed with NHTSA | 2026-04-15 |
| Vehicles in the campaign | 557 |
| Reported remedied | 431 (77%) |
| Reported unreachable | 0 |
| Reported removed | 0 |
These are the manufacturer's totals for the whole campaign at the end of 2026 quarter 1, as filed with NHTSA. They do not say whether one vehicle has been remedied: check the VIN with the official lookups. The reports are from data as of 2026-10-19.
What is wrong
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."
What can happen
A vehicle that drifts out of its lane increases the risk of a crash.
The 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.
| 2018 MACK ANTHEM (AN) | Listed as a series or trim of this model. |
|---|---|
| 2019 MACK ANTHEM (AN) | Listed as a series or trim of this model. |
| 2020 MACK ANTHEM (AN) | Listed as a series or trim of this model. |
| 2021 MACK ANTHEM (AN) | Listed as a series or trim of this model. |
| 2022 MACK ANTHEM (AN) | Listed as a series or trim of this model. |
| 2018 MACK GRANITE (GR) | Listed as a series or trim of this model. |
| 2019 MACK GRANITE (GR) | Listed as a series or trim of this model. |
| 2020 MACK GRANITE (GR) | Listed as a series or trim of this model. |
| 2021 MACK GRANITE (GR) | Listed as a series or trim of this model. |
| 2022 MACK GRANITE (GR) | Listed as a series or trim of this model. |
| 2018 MACK GRANITE (GU) | Listed as a series or trim of this model. |
| 2019 MACK GRANITE (GU) | Listed as a series or trim of this model. |
| 2020 MACK GRANITE (GU) | Listed as a series or trim of this model. |
| 2021 MACK GRANITE (GU) | Listed as a series or trim of this model. |
| 2022 MACK GRANITE (GU) | Listed as a series or trim of this model. |
| 2018 MACK PINNACLE (CHU) | Listed as a series or trim of this model. |
| 2019 MACK PINNACLE (CHU) | Listed as a series or trim of this model. |
| 2020 MACK PINNACLE (CHU) | Listed as a series or trim of this model. |
| 2021 MACK PINNACLE (CHU) | Listed as a series or trim of this model. |
| 2022 MACK PINNACLE (CHU) | Listed as a series or trim of this model. |
| 2018 MACK PINNACLE (CXU) | Listed as a series or trim of this model. |
| 2019 MACK PINNACLE (CXU) | Listed as a series or trim of this model. |
| 2020 MACK PINNACLE (CXU) | Listed as a series or trim of this model. |
| 2021 MACK PINNACLE (CXU) | Listed as a series or trim of this model. |
| 2022 MACK PINNACLE (CXU) | Listed as a series or trim of this model. |
| 2018 MACK PINNACLE (PI/PN) | Listed as a series or trim of this model. |
| 2019 MACK PINNACLE (PI/PN) | Listed as a series or trim of this model. |
| 2020 MACK PINNACLE (PI/PN) | Listed as a series or trim of this model. |
| 2021 MACK PINNACLE (PI/PN) | Listed as a series or trim of this model. |
| 2022 MACK PINNACLE (PI/PN) | Listed as a series or trim of this model. |
A vehicle with no link is not in this site's catalog, which covers cars, multipurpose vehicles and trucks by model year. The campaign is from data as of 2026-10-19.
Bulletins for the same vehicles and component
| S3837 202312 | 2024-01-03. Service bulletin. Fleet Campaign: For certain MDI Mack Trucks an updated adaptive cruise software has been developed. |
|---|---|
| S7625 | 2023-04-04. Service bulletin. Updated the end date from december 2022-June 9 2023 |
| S7641 | 2022-08-02. Service bulletin. Bendix Wingman Fusion, Front Radar Fulfillment |
| KC-686 | 2022-06-07. Service bulletin. (Back Office Only) Mack Chassis - Cruise Control Inoperative After Disabling The Electronic Stability Program (ESP) |
| KC-394 | 2022-02-04. Service bulletin. Mack Chassis - CXU - Lane Departure Warning System ( LDWS ) More Sensitive To The Right-hand ( Passenger ) Side Of The Vehicle; PI0882 |
| KC-383 | 2022-02-04. Service bulletin. Mack Chassis - Equipped With Bendix Fusion, With Or Without Lane Departure Warning ( LDWS ) - Diagnostic Trouble Code ( DTC ) SPN 70 FMI 9, Bendix Code 64 With Possible "Lane Departure Warning Malfunction" Message - US17 And Newer |
| KC-199 | 2022-01-07. Service bulletin. 13 Liter Engines ONLY - Engine Coolant Pump Housing Leak; Coolant Found Around The Oil Cooler Duct Cover Or In Between The Coolant Pump Housing And Oil Cooler Housing - Model Years 2019 And 2020 |
| FSB 366-005_M | 2021-11-05. Service bulletin. Forward Looking Radar Shortage |
| KC-544 | 2021-06-04. Service bulletin. Model Year 2017, 2018 - ** Tech Tip ** TT - 000 - 2017 GPS Inoperative Message In DID ( Driver Information Display ) - Telematics Gateway ( TGW ) |
| SLM20-003 | 2020-04-03. Service bulletin. Monthly Bulletin Release Letter |
A bulletin is the manufacturer's note to its dealers. It is not part of this recall.