THE WEEKLY DRIVER

AUTOMOTIVE NEWS, CAR REVIEWS, AND PODCAST

Reliability Database

Hummer

Engine Reliability & Known Problems

Based on 1,203 NHTSA complaints. Updated April 2026.

3 Models
12 Engines Rated
3 Generations
1,203 NHTSA Complaints
Engine Ratings Overview
4 recommended 1 caution 7 avoid

Compact SUV

3 models
H2
1 generation · 3 engines
2003-2009
1 recommended 2 avoid
H2 Sut
1 generation · 3 engines
2005
1 recommended 1 caution 1 avoid
H3
1 generation · 6 engines
2006-2010
2 recommended 4 avoid
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