What Mack Granite (GU) owners have reported to NHTSA, the service bulletins the manufacturer sent dealers, and any federal defect investigations, by model year. See Mack Granite (GU) safety recalls or check your VIN.
Complaints owners filed with NHTSA, by the model year of the vehicle. A high count can also mean a popular year, so compare it with how many were sold.
| Year | Complaints | Crashes | Fires | Injured | Deaths | TSBs |
|---|---|---|---|---|---|---|
| 2025 | 0 | 0 | 0 | 0 | 0 | 4 |
| 2024 | 0 | 0 | 0 | 0 | 0 | 22 |
| 2023 | 0 | 0 | 0 | 0 | 0 | 48 |
| 2022 | 0 | 0 | 0 | 0 | 0 | 85 |
| 2021 | 0 | 0 | 0 | 0 | 0 | 85 |
| 2020 | 0 | 0 | 0 | 0 | 0 | 103 |
| 2019 | 0 | 0 | 0 | 0 | 0 | 201 |
| 2018 | 1 | 0 | 0 | 0 | 0 | 178 |
| 2017 | 1 | 1 | 0 | 1 | 0 | 198 |
| 2016 | 0 | 0 | 0 | 0 | 0 | 164 |
| 2015 | 1 | 0 | 0 | 0 | 0 | 148 |
| 2014 | 0 | 0 | 0 | 0 | 0 | 166 |
| 2013 | 0 | 0 | 0 | 0 | 0 | 176 |
| 2012 | 0 | 0 | 0 | 0 | 0 | 185 |
| 2011 | 0 | 0 | 0 | 0 | 0 | 116 |
| 2010 | 0 | 0 | 0 | 0 | 0 | 114 |
The vehicle systems named most often in Mack Granite (GU) complaints (one complaint can name several).
In the owners’ own words, as filed with NHTSA. Unverified reports; NHTSA removes personal details before publishing.
THE "U"BOLTS THAT ATTACH THE DRIVE AXLES TO THE SUSPENSION APPEAR TO BE FAULTY. WE'VE HAD TWO BREAK ON TWO SPATE OCCASIONS IN LESS THAN A WEEK. BOTH TIMES THE TRUCK WAS LOADED WITH APPROXIMATELY 79000 LBS, WE DON'T RUN OVER WEIGHT, AND DRIVING. FIRST TIME WAS LEFT REAR DRIVE AXLE AND THE SECOND WAS ON THE RIGHT SIDE OF THE FORWARD DRIVE AXLE. WHEN PURCHASING NEW U BOLTS THE PARTS GUY MENTIONED THAT THEY'VE BEEN SELLING A LOT OF THEM SINCE THE WEATHER TURNED COLD. LUCKILY MY DRIVERS ARE VERY AWARE AND STOPPED AS SOON AS IT HAPPENED. I CAN ONLY IMAGINE WHAT WOULD HAPPEN IF AN AXLE BROKE LOOSE AT 65 MPH WITH A FULL LOAD ON THE TRUCK
THIS REFERRAL INVOLVES A DUMP TRUCK INJURY ACCIDENT RESULTING IN THE VEHICLE OVERTURNING. I AM A KY OSHA COMPLIANCE OFFICER ASSIGNED A COMPLAINT IN REGARDS TO THIS VEHICLE. THE COMPLAINANT ALLEGES THAT THE TRUCK NEEDED NEW TIRES. THEY ALLEGE THAT A BLOWN WORN TIRE CAUSED THIS ACCIDENT. THE ACCIDENT HAPPENED NEAR MARION, KY. THE TRUCK IS NOW IN A COLLISION REPAIR CENTER AT 945 NANDINO BLVD IN LEXINGTON, KY. I INSPECTED THE VEHICLE AND IT HAD A WORN INNER RIGHT REAR TIRE. THE TRUCK WAS LOADED WITH 25 TONS OF GRAVEL AND TRAVELING AT APPROXIMATELY 45 MPH WHEN THE DRIVER LOST CONTROL OF THE VEHICLE WHICH EVENTUALLY OVERTURNED. NO OTHER VEHICLES WERE INVOLVED. SINCE THIS IS MORE OF A DOT ISSUE I A…
YOKE NUT AT END OF TRANSMISSION COMES LOOSE. CAUSES A VIBRATION THAT MAKES THE DRIVE LINE FILL OUT. OR NEEDS REPLACED. HAS COME LOOSE 4 TIMES IN 19 MONTHS. MACK IS NOW CHARGING ME FOR THE REPAIRS. MACK HAS NOT GIVEN ME ANY PAPERWORK ON WARRANTY WORK. HAVE NOT SENT ME A BILL YET
Repair instructions and other communications the manufacturer sent dealers about known issues. A TSB is not a recall, and the repair is usually free only while the car is under warranty; ask your dealer for the bulletin number.
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
CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
CBR - Mack Carrier Nut Adhesive Change.
CBR - The purpose of this solution is to give information on Engine Control Module (EMS) Software content.
CBR - Mack Chassis - Engine Brake Only Works With The Brake Pedal, No Function During Cruise. US07 And Newer Emissions, Model Year 2008 And Newer.
CBR - Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions to US22+OBD2023 (DOES NOT APPLY TO AN(4) and PR(4)).
Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.
CBR - Mack Temperature Sensor Troubleshooting Guide
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.
CBR - A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back-office communication but failing to transmit GPS location data.
CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded.
Inactive Code P25AE00 Being Generated After A Hard Pull And A Momentary Drop In Engine Oil Pressure (Low Oil Pressure) (Possible Related Codes - SPN4811 , SPN 100 , PID 100)
NHTSA’s Office of Defects Investigation opens these when complaints point to a possible safety defect. Many end in a recall.
On April 28, 2020, the Office of Defects Investigation (ODI) opened PE20-005 to investigate reports of 2013-2015 Mack CHU and CXU trucks equipped with mDrive transmissions continuing to push forward when stopping, possibly increasing the risk of a crash. After more field reports were discovered, the scope of the investigation was expanded to cover MY 2013-2016 vehicles. The mDrive transmission is Mack's version of Volvo's I-Shift transmission, an automated manual transmission that allows gear sh
Source: NHTSA Office of Defects Investigation public data (complaints, manufacturer communications, investigations), model years 2010 and later. Had a safety problem? Report it to NHTSA.
In complaints filed with NHTSA for model years 2010–2025, owners most often name: power train, suspension, wheels. 3 complaints are on record.
No. A complaint is an unverified report from an owner. A technical service bulletin (TSB) is the manufacturer telling dealers how to fix a known issue; it is not a safety recall and is usually covered only under warranty. A recall is a formal safety action, and its repair is free.
File a vehicle safety complaint at NHTSA.gov. NHTSA reads every report, and patterns of complaints are what open defect investigations and, eventually, recalls.