MACK PINNACLE (PI/PN)

SERVICE BRAKES, AIR:SUPPLY:RESERVOIR/TANK

Mack Trucks, Inc. (Mack) is recalling certain 2024-2025 Pinnacle (PI/PN) trucks. The air tanks have an insufficient volume of air for the brake system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."

Risk: Insufficient air volume can reduce braking performance and increase the risk of a crash.

SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE

Mack Trucks, Inc. (Mack) is recalling certain 2020-2025 Anthem, Granite, TerraPro and Pinnacle vehicles, equipped with Bendix EC80 Advanced Electronic Control Units (ECU). Electrical noise and low signal to the power line carrier may cause the ECU to incorrectly process commands or stop working.

Risk: Safety systems that depend on the ECU (Automatic Traction Control, ABS, Electronic Stability Control, Active Cruise Control, and Collison Mitigation System) may have diminished or lost functionality, increasing the risk of a crash.

SEAT BELTS:CRITICAL FASTENERS

Mack Trucks, Inc. (Mack) is recalling certain 2024-2025 Anthem, Granite, and Pinnacle vehicles equipped with RollTek driver's seat assemblies. The seat pedestal and seat belt attachment may have been improperly tightened.

Risk: An improperly tightened seat pedestal and seat belt attachment may not restrain the occupant as intended, increasing their risk of injury during a crash.

STEERING

Mack Trucks, Inc. (Mack) is recalling certain 2024 Anthem, Pinnacle, and Terrapro vehicles. The steering gear assemblies may have been assembled incorrectly with fewer recirculating balls than are required, which may result in a loss of steering control.

Risk: A loss of steering control increases the risk of a crash.

ELECTRONIC STABILITY CONTROL (ESC)

Mack Trucks, Inc. (Mack) is recalling certain 2024 Anthem and Pinnacle vehicles. A software programming error may cause the electronic stability control (ESC) to be inoperative.

Risk: Driving with an inoperative electronic stability control system can increase the risk of a crash.

STEERING

Mack Trucks, Inc. (Mack) is recalling certain 2021-22 Granite, Anthem, LR, Pinnacle, and Terrapro tractor trailers. The steering gears may have been assembled incorrectly, which can cause the gear to fracture.

Risk: A fractured steering gear can cause a loss of steering control, increasing the risk of a crash.

ELECTRONIC STABILITY CONTROL (ESC):CONTROL MODULE:SOFTWARE

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."

Risk: A vehicle that drifts out of its lane increases the risk of a crash.

WHEELS

Mack Trucks, Inc. (Mack) is recalling certain 2021-2022 Anthem, Granite, and Pinnacle vehicles. The hubcap compression spring can cause the hubcap to separate.

Risk: A separated hubcap can create a road hazard, increasing the risk of a crash.

EXTERIOR LIGHTING

Mack Trucks, Inc. (Mack) is recalling certain 2020 Anthem and Pinnacle trucks. The conspicuity reflectors at the back of the cab may be blocked by the exhaust system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Assoc. Equipment."

Risk: If the reflectors are blocked, the vehicle's visibility to other drivers may be reduced, increasing the risk of crash.