Vehicle report

2026 MACK GRANITE GR (4)

Service bulletins

17 bulletins

Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.

CBR-2592-1 202606

Service Bulletin/Repair Instructions

The purpose of this CBR is to provide steps on how to correct a customer complaint of DTC P107B86 accompanied With intermittent loss of throttle.

GDC26-02 202605

Service Bulletin/Repair Instructions

Fault diagnostic information for Supplemental Restraint / Airbag Inflation System (SRS)

GDC26-001 202604

Over The Air

GDC - Transmission Oil Level Sensor

CBR 2362-3 202604

Service Bulletin/Repair Instructions

CBR - Mack Carrier Nut Adhesive Change.

CBR 2573-1 202604

Service Bulletin/Repair Instructions

CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.

CBR 2712-7 032026

Service Bulletin/Repair Instructions

CBR - No Start Condition After Over the Air Programing.

CBR 2218-6 032026

Service Bulletin/Repair Instructions

CBR - Parker F3 Hydraulic Pump Troubleshooting.

CBR 199 202512

Service Bulletin/Repair Instructions

Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.

CBR 2172-5 082025

Service Bulletin/Repair Instructions

CBR - When an OTA (Over-The-Air) job starts to program the VECU blocks the starter relay out, if the job ends in a Critical failure, the vehicle will remain in Safe State.

CBR 2488 072025

Service Bulletin/Repair Instructions

CBR - A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back-office communication but failing to transmit GPS location data.

CBR 407 072025

Service Bulletin/Repair Instructions

CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded.

S4574 072025

Service Campaign

SC - Mack Trucks has identified that certain truck models may have been assembled with incorrectly torqued interaxle prop shaft U-joint hardware.

CBR 170-8 202505

Service Bulletin/Repair Instructions

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)

CBR 2107-21 202505

Service Bulletin/Repair Instructions

Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer

CBR 901-5 202505

Service Bulletin/Repair Instructions

Remote Control Central Door Lock, Programming; Key Fob Cannot Be Programmed Or Does Not Work After Programming - Model Year 2018 And Newer

CBR 70-8 202505

Service Bulletin/Repair Instructions

Lack of lateral structural hood support.

CBR 2464-1 202505

Service Bulletin/Repair Instructions

Mack Chassis - Rear Axle Overheat

Reading this report

Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.