2027 Mack Granite (Gr) problems, complaints & recalls
Safety recalls (1)
Wheels:lugs/Nuts/Bolts/Studs 2026-05-28 · campaign 26V351000 · 644 vehicles ⚠ DO NOT DRIVE
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2026 Anthem (AN), 2026-2027 Pioneer PR (4), Pinnacle (PI/PN), Granite (GR), and 2027 Anthem AN (4) vehicles. The wheel lug nuts may loosen and allow the wheel to detach.
Risk: Wheel detachment can cause a loss of vehicle control or create a road hazard, increasing the risk of a crash or injury.
Fix: Owners are advised not to drive their vehicles until the repair has been performed. Dealers will inspect the wheel and hub mating surfaces, remove any masking material, and replace any worn components if necessary, free of charge. Owner notification letters were mailed June 22, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0495. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on May 31, 2026.
Service bulletins (8)
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.
Electrical System 2026-08-10 · CBR 159 202608 · Service Bulletin/Repair Instructions
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
Wheels 2026-07-23 · CBR 2595 072026 · Service Bulletin/Repair Instructions
cbr - the purpose of this cbr is to provide information on 2010 and newer mack granite chassis experiencing a low frequency vibration.
Engine 2026-06-22 · 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.
Structure:body 2026-06-19 · S4990 202606 · Service Campaign
the crossmember may come in contact with certain driveshaft u-joint configurations.
Power Train 2026-04-09 · CBR 2573-1 202604 · Service Bulletin/Repair Instructions
cbr - mack chassis - through shaft bearing retainer breakage on mack carriers.
Power Train 2026-04-09 · CBR 2362-3 202604 · Service Bulletin/Repair Instructions
cbr - mack carrier nut adhesive change.
Showing the 6 most recent of 8 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.