2023 Mack Granite (Gu) problems, complaints & recalls
Safety recalls (1)
Exterior Lighting:turn Signal 2023-08-25 · campaign 23V600000 · 27,418 vehicles
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2015-2023 GU and GR vehicles. The turn signals may be positioned incorrectly, reducing their visibility. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
Risk: Low turn signal visibility may not alert other drivers to a turning vehicle, increasing the risk of a crash.
Fix: Dealers will add additional turn signal lighting, free of charge. Owner letters were mailed September 25, 2024. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0448.
Service bulletins (48)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Power Train 2024-04-22 · CBR-1008 202404 · Service Bulletin/Repair Instructions
cbr: equipped with an automated manual transmission model d or f ( amt-d, amt-f, mdrive) missing x1 value in vda and default settings guidelines, parameterp1aob; fault code p1052-54, error 40,or error 18 encountered during clutch or tran.
Power Train 2024-04-11 · CBR-2258 202404 · Service Bulletin/Repair Instructions
cbr: diagnostic trouble code (dtc) p107471 -amt-f
Service Brakes, Air 2024-04-02 · CBR-2360 202404 · Service Bulletin/Repair Instructions
cbr: chassis equipped with vecu5 active datalink/communication faults for multiple modules; abs and srs communication faults
Engine And Engine Cooling 2024-04-02 · CBR-2013 202404 · Service Bulletin/Repair Instructions
cbr: turbo compound (tc) hot side noise, diagnostic information.
Electrical System 2024-03-18 · S3852 202403 · Service Bulletin/Repair Instructions
service campaign: on certain mack gr model trucks built between may 10, 2021, to march 28, 2023, it has been determined that the air horn and battery cable could interfere with each other causing the horn to rub through the insulation on the battery cable. to correct these findings, install a new ba
Engine And Engine Cooling 2024-03-01 · S3904 202403 · Service Bulletin/Repair Instructions
service campaign: mack trucks has determined that certain an, gr, pi, and te model trucks built with a mp8 engine could experience a reduced clamping load on the turbocharger mounting hardware causing the hardware to become loose. on affected vehicles follow the instructions below to remove the turb
Showing the 6 most recent of 48 bulletins. Search all of them free at nhtsa.gov.
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.