Reliability & cost of ownership
Mack GU Reliability & Common Problems
How reliable is the Mack GU? Compare every model year side by side — NHTSA recalls, owner complaints, and crash-test stars where on file — then open the year you're shopping for its AI reliability outlook where NHTSA has enough data.
Mack GU problems by model year
27 recall entries across 5 model years and 6 owner complaints across 9 model years on file, sourced from the federal NHTSA database. We couldn't confirm the NHTSA recall list for the remaining 4 model years — check the VIN at nhtsa.gov/recalls.
| Year | Recalls | Complaints | NCAP stars | Full report |
|---|---|---|---|---|
| 2018 GU | Not confirmed | 1 | No overall rating on file | Recalls & complaints → |
| 2015 GU | Not confirmed | 1 | No overall rating on file | Recalls & complaints → |
| 2014 GU | Not confirmed | 1 | No overall rating on file | Recalls & complaints → |
| 2013 GU | Not confirmed | 1 | No overall rating on file | Recalls & complaints → |
| 2011 GU | 5 | None on file at try.vin | No overall rating on file | AI reliability outlook → |
| 2010 GU | 4 | 1 | No overall rating on file | AI reliability outlook → |
| 2009 GU | 7 | 1 | No overall rating on file | AI reliability outlook → |
| 2008 GU | 9 | None on file at try.vin | No overall rating on file | AI reliability outlook → |
| 2007 GU | 2 | None on file at try.vin | No overall rating on file | Recalls & complaints → |
Most-complained-about components
Owner complaints filed with NHTSA against the Mack GU, grouped by the component each complaint names — the fastest read on where this model gives trouble.
- engine2 complaints
- power train2 complaints
- vehicle speed control1 complaint
- structure1 complaint
- electrical system1 complaint
- exterior lighting1 complaint
- visibility/wiper1 complaint