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Service bulletins for the 2025 Mack Granite

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

63 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
TSB M-913-001 2026092026-10-02. Service bulletin. ENGINE; POWER TRAIN. Parker engine-mounted hydraulic pump service bulletin.
CBR-2592-1 2026062026-06-29. Service bulletin. ENGINE. 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.
CBR 2107-22 2026012026-02-02. Service bulletin. ENGINE. CBR - Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions to US22+OBD2023 (DOES NOT APPLY TO AN(4) and PR(4)).
CBR 199 2025122026-01-05. Service bulletin. ENGINE. Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.
CBR 2171-11 2025112025-12-03. Service bulletin. ENGINE; ELECTRICAL SYSTEM. CBR - Mack Temperature Sensor Troubleshooting Guide
CBR 199-6 2025112025-12-03. Service bulletin. 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.
CBR 2107-21 2025052025-06-02. Service bulletin. FUEL/PROPULSION SYSTEM; ENGINE. Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer
CBR 170-8 2025052025-06-02. Service bulletin. ENGINE. 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-561 2025032025-04-02. Service bulletin. ENGINE. If oil dilution is suspected refer to the applicable CBR solution below: ∙ CBR-659􀁡Mack Chassis - Oil Diluted With Fuel; Fuel In Oil, Diagnostic Information - All Emissions, All Model Years
S4342-2025022025-03-03. Service bulletin. FUEL/PROPULSION SYSTEM; ENGINE. Mack Trucks has determined that a select group of trucks were built with an AHI Module fuel pressure sensor which does not meet our specifications.
S4309 2024122025-01-02. Service campaign. ENGINE. Mack Trucks has identified that certain GR model trucks may encounter an issue with the EECU during a shutdown event. If this occurs, the EECU could become corrupted, leading to multiple fault codes, engine derate, and, in some cases, preventing the truck from starting. For vehicles within the affected population, please follow the instructions below to program the EECU.
CBR-997 2024112024-12-02. Service bulletin. ENGINE. Vehicles may present with oil leak coming from the clutch/flywheel housing and observation of burned clutch smell or clutch slipping. These symptoms can be mistaken as a crankshaft rear main seal leak, when the actual cause is the crankshaft adaptor O-ring.
CBR-2417 2024112024-11-27. Service bulletin. ENGINE. CBR - 11L Engine block compatibility and Backward Conversion Parts Requirements
CBR-2409 2024112024-11-27. Service bulletin. ENGINE. CBR - 13L Engine - Rear Main Oil Seal Leak Model Year 2025
CBR-2411 2024102024-11-04. Service bulletin. ENGINE. CBR - One-Box SCR Weld Leaks.
CBR-2409 2024102024-11-04. Service bulletin. ENGINE. CBR - 13L Engine - Rear Main Oil Seal Leak - Model Year 2025
CBR-2263 2024102024-11-04. Service bulletin. ENGINE. CBR - Mack Chassis - Timing Gear Plate Repair
CBR-561 2024082024-09-04. Service bulletin. ENGINE. CBR: 11L, 13L, And 16L Engine Oil Analysis Specifications - US10 And Newer Emissions
CBR-523 2024082024-09-04. Service bulletin. ENGINE. CBR: Overhead Wear Overview - Model Year2018 To Current (Common Rail Fuel System ONLY)
CBR-2139 2024052024-06-04. Service bulletin. FUEL/PROPULSION SYSTEM; ENGINE. CBR: Vehicles built with an 11 liter engine may experience a complaint of excessive fuel in the oil. It is possible that the source of the fuel is the rear fuel galley plug in the cylinder head. A new and improved fuel galley plug has been developed to resolve this issue.
CBR-2013 2024042024-05-01. Service bulletin. ENGINE AND ENGINE COOLING. CBR: Turbo Compound (TC) Hot Side Noise, Diagnostic Information.
CBR-2139 2024032024-04-02. Service bulletin. ENGINE AND ENGINE COOLING. CBR: Vehicles built with an 11 liter engine may experience a complaint of excessive fuel in the oil. It is possible that the source of the fuel is the rear fuel galley plug in the cylinder head.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.