No complaints are listed for the 2021 Mack Pinnacle (pi/pn). NHTSA's API and bulk file list none in this build.
Data build 2026-10-09.
NHTSA lists this vehicle as MACK PINNACLE (PI/PN).
Model-generated complaint tags: No complaints are listed for tagging.
Recalls
See new recalls and investigations this week.
4 recalls.
Date: 2024-10-23. Systems: ELECTRICAL SYSTEM, SERVICE BRAKES, HYDRAULIC.
Defect: 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.
Consequence: 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.
Remedy: Dealers will reprogram the ECU software, free of charge. Owner notification letters were mailed December 9, 2024. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0472.
Do not drive: No. Park outside: No.
Date: 2022-06-07. Systems: STEERING.
Defect: 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.
Consequence: A fractured steering gear can cause a loss of steering control, increasing the risk of a crash.
Remedy: Dealers will replace the steering gear, free of charge. Owner notification letters were mailed on July 29, 2022. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0437.
Do not drive: No. Park outside: No.
Date: 2021-06-02. Systems: WHEELS.
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2021-2022 Anthem, Granite, and Pinnacle vehicles. The hubcap compression spring can cause the hubcap to separate.
Consequence: A separated hubcap can create a road hazard, increasing the risk of a crash.
Remedy: Dealers will remove the hubcap, free of charge. Owner notification letters were mailed June 30, 2021. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0425.
Do not drive: No. Park outside: No.
Date: 2021-04-01. Systems: ELECTRONIC STABILITY CONTROL (ESC).
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 Stabilit (excerpt)
Consequence: A vehicle that drifts out of its lane increases the risk of a crash. (excerpt)
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. (excerpt)
Do not drive: No. Park outside: No.
Manufacturer communications
197 manufacturer communications.
Communications by system| System | Count |
|---|
| ENGINE AND ENGINE COOLING | 77 |
|---|
| ELECTRICAL SYSTEM | 48 |
|---|
| POWER TRAIN | 29 |
|---|
| ENGINE | 14 |
|---|
| EQUIPMENT | 14 |
|---|
| SUSPENSION | 11 |
|---|
| UNKNOWN OR OTHER | 8 |
|---|
| SERVICE BRAKES, AIR | 7 |
|---|
11036580
Date: 2026-08-10. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
Mack Trucks Equipped With A Cummins Engine - Engine Preheat Icon Does Not Illuminate In The Instrument Cluster (IC) During Engine Pre-heat (Intake Air Heater) Operation - Vehicles With 2018Instrument Cluster Update, Model Year2018 And Newer
11032094
Date: 2026-04-30. Type: Service Bulletin/Repair Instructions. Systems: STRUCTURE, UNKNOWN OR OTHER.
CBR - Mack Chassis - Dash Panel Cracking at Mounting to BIW.
11032086
Date: 2026-04-09. Type: Service Bulletin/Repair Instructions. Systems: POWER TRAIN.
CBR - Mack Carrier Nut Adhesive Change.
11032092
Date: 2026-04-09. Type: Service Bulletin/Repair Instructions. Systems: POWER TRAIN.
CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
11030579
Date: 2026-03-19. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM, UNKNOWN OR OTHER.
CBR - No Start Condition After Over the Air Programing.
11030583
Date: 2026-03-02. Type: Service Bulletin/Repair Instructions. Systems: SUSPENSION.
CBR - Z Spring Bracket Wear.
11028032
Date: 2026-01-07. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
CBR - Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions to US22+OBD2023 (DOES NOT APPLY TO AN(4) and PR(4)).
11027007
Date: 2025-12-04. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.
11026025
Date: 2025-11-22. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM, ENGINE.
CBR - Mack Temperature Sensor Troubleshooting Guide
11026021
Date: 2025-11-12. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
CBR - 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.