The worst 2026 Mack Granite GR (4) problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
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Recalls 2
Service brakes, air: drum
- What is wrong
- Mack Trucks, Inc. (Mack) is recalling certain 2026 Mack GR trucks. The brake drum and steer axle combination are incompatible, which may cause a loss of brake function. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, "Air Brake Systems."
- Risk
- Reduced brake function can extend the distance required to stop, increasing the risk of a crash.
- Remedy
- Dealers will replace the steer axle brake drums, free of charge. Owner notification letters were mailed August 27, 2025. Owners may contact Mack's customer service at 1‑800‑866‑1177. Mack's number for this recall is SC0482.
Recall number 25V495000 · Recall details
Service brakes, air: drum
- What is wrong
- Mack Trucks, Inc. (Mack) is recalling certain 2026 Granite trucks. The incorrect drive axle brake drums were installed, resulting in an incorrect load rating on the door jamb label.
- Risk
- Incorrect weight rating information on the door can result in overloading the axles, increasing the risk of a crash.
- Remedy
- Dealers will replace the brake drums, free of charge. Owner notification letters were mailed June 16, 2025. Owners may contact Mack's customer service at 1‑800‑866‑1177. Mack's number for this recall is SC0472.
Recall number 25V352000 · Recall details
Technical service bulletins for the 2026 Mack Granite GR (4) 20
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Power Cable Alternator Replacement
- Diagnostic instructions for CAN network communication issues.
- Jumper Harness Repair for Version 4 Mack Trucks
- The purpose of this CBR is to provide steps on how to correct a customer complaint of DTC P107B86...
- Fault diagnostic information for Supplemental Restraint / Airbag Inflation System (SRS)
- Gdc
- Cbr
- Cbr
- Cbr
- Cbr
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Questions about the 2026 Mack Granite GR (4)
Is the 2026 Mack Granite GR (4) reliable?
Owners have filed 0 complaints about the 2026 Mack Granite GR (4).
What is the most common problem with the 2026 Mack Granite GR (4)?
There are not enough complaints to tell.
How many recalls does the 2026 Mack Granite GR (4) have?
2 recalls, covering service brakes, air.
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