Mack Trucks has identified that certain GR model trucks may encounter an issue with the EECU during a...
Mack technical service bulletin S4309 202412 for 2025 Mack Granite (GR).
- Bulletin number
- S4309 202412
- Component
- Engine
- Summary
- 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.
Owners of these vehicles have filed 1 complaints in the engine category.
Vehicles covered
- Mack Granite (GR) 2025 2025
VIN decoder
See the problems and recalls for an exact car
Buying a used Mack Granite (GR)?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history