The "u"bolts that attach the drive axles to the suspension appear to be faulty. We've had two break on two spate occasions in less than a week. Both times the truck was loaded with approximately 79000 lbs, we don't run over weight, and driving. First time was left rear drive axle and the second was on the right side of the forward drive axle. When purchasing new u bolts the parts guy mentioned that they've been selling a lot of them since the weather turned cold. Luckily my drivers are very aware and stopped as soon as it happened. I can only imagine what would happen if an axle broke loose at 65 MPH with a full load on the truck
The worst 2018 Mack Granite (Gu) problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Suspension1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Suspension1
Recalls 4
Tires
- What is wrong
- Mack Trucks, Inc. (Mack) is recalling certain 2019-2025 GR and 2018 GU Granite vehicles equipped with non-DOT tested tires. The tires may not have been DOT tested and confirmed to be sufficient for the vehicles. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 119, "New Pneumatic Tires - Other Than Passenger Cars."
- Risk
- Insufficient tires can fail, increasing the risk of a crash.
- Remedy
- Dealers will inspect and replace the tires as necessary, free of charge. Owner notification letters were mailed November 6, 2024. Owners may contact Mack customer service at 1‑800‑866‑1177. Mack's number for this recall is SC0471.
Recall number 24V773000 · Recall details
Exterior lighting: turn signal
- What is wrong
- 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.
- Remedy
- 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.
Recall number 23V600000 · Recall details
Electronic stability control (ESC): control module: software
- What is wrong
- Mack Trucks, Inc. (Mack) is recalling certain 2018-2022 Anthem (AN), Granite (GR/GU), and Pinnacle (CHU/CXU/PI) vehicles equipped with "camelback" rear suspension and electronic stability control. The vehicles may not stay in their lane at certain speeds. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 136, "Electronic Stability Control Systems on Heavy Vehicles."
- Risk
- A vehicle that drifts out of its lane increases the risk of a crash.
- Remedy
- Mack will notify owners, and dealers will reprogram the vehicle control units, free of charge. The recall began on April 21, 2021. Owners may contact Mack customer service at 1‑800‑866‑1177. Mack's number for this recall is SC0423.
Recall number 21V233000 · Recall details
Interior lighting
- What is wrong
- Mack Trucks, Inc. (Mack) is recalling certain 2018 Anthem (AN), Granite (GU), and Pinnacle (CXU, PI) trucks. An electrical overload condition may cause the light control module (LCM) to fail, resulting in the loss of the exterior lighting, interior dashboard lighting, and the windshield wipers.
- Risk
- Loss of lighting or windshield wiper function can increase the risk of a crash.
- Remedy
- Mack will notify owners, and dealers will replace and reprogram the LCM, free of charge. The recall began on March 23, 2018. Owners may contact Mack customer service at 1‑800‑866‑1177. Mack's number for this recall is SC0409.
Recall number 18V152000 · Recall details
Technical service bulletins for the 2018 Mack Granite (Gu) 179
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
What 2018 Mack Granite (Gu) owners say
Most recent owner complaints, unedited.
Compare the 2018 Mack Granite (Gu)
Other model years
Questions about the 2018 Mack Granite (Gu)
Is the 2018 Mack Granite (Gu) reliable?
Owners have filed 1 complaint about the 2018 Mack Granite (Gu), close to a typical Granite (Gu) model year.
What is the most common problem with the 2018 Mack Granite (Gu)?
Suspension, with 1 complaint.
How many recalls does the 2018 Mack Granite (Gu) have?
4 recalls, covering tires, exterior lighting and electronic stability control (esc).
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