THE WEEKLY DRIVER

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Reliability Database

Hummer

Engine Reliability & Known Problems

Based on 1,199 NHTSA complaints. Updated May 2026.

3 Models
11 Engines Rated
3 Generations
1,199 NHTSA Complaints
Engine Ratings Overview
3 recommended 3 caution 5 avoid

Compact SUV

3 models
H2
1 generation · 3 engines
2003-2009
1 recommended 1 caution 1 avoid
H2 Sut
1 generation · 3 engines
2005
1 recommended 1 caution 1 avoid
H3
1 generation · 5 engines
2006-2010
1 recommended 1 caution 3 avoid
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