Car Problem DataNHTSA records

Mack GU

Owners filed 6 complaints across 9 model years of the Mack GU. The 2018 drew the most (1); the 2018 the fewest (1).

Model years9
Complaints6
Recalls27
Fires0
Deaths0

Every Mack GU model year compared

Complaints per year
YearComplaintsRelative volumeRecallsFiresCrashesMost reportedStatus
20181
0——Electrical SystemRoutine
20151
0——Power TrainRoutine
20141
0—1Power TrainRoutine
20131
0——Structure › BodyRoutine
20110
5———Routine
20101
4——Vehicle Speed ControlRoutine
20091
7——EngineRoutine
20080
9———Routine
20070
2———Routine

Which Mack GU years should you avoid?

On raw complaint volume the 2018 is the weakest year on record, with 1 complaints concentrated in the electrical system.

Read these numbers with sales volume in mind. A model year that sold in huge numbers naturally accumulates more reports than a rare one, and older cars have had more years to fail. The stronger signal is the severity columns and whether the same component keeps coming up year after year.

Data: NHTSA complaint and recall files, September 2026. Complaints are unverified owner reports.