Hummer H2 vs Chevrolet Trailblazer EXT

Both cars' complete complaint records, side by side.

Read the totals carefully. NHTSA publishes no sales figures, so the car that sold more collects more complaints regardless of quality. The rows worth weighing are the proportions — the share of complaints that involved harm, and which part dominates.

Measure	Hummer H2	Chevrolet Trailblazer EXT
Complaints on file	429	1,070
Model years covered	2002–2009	2002–2006
Worst model year	2003	2003
Best model year	2008	2002
Crashes reported	30	23
Fires reported	13	20
Injuries reported	28	21
Deaths reported	0	0
Most complained-about part	Windows, Mirrors & Wipers	Fuel & Propulsion
Share of complaints involving harm	16.6%	6%

Hummer H2 by year

3 186 74 103 35 15 10 3

02 03 04 05 06 07 08 09

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded

What breaks

Windows, Mirrors & Wipers 100 23.3%

Electrical System 74 17.2%

Brakes 49 11.4%

Steering 33 7.7%

Engine & Cooling 24 5.6%

Transmission & Drivetrain 24 5.6%

Airbags 22 5.1%

Body & Structure 21 4.9%

Chevrolet Trailblazer EXT by year

120 406 306 238

02 03 04 06

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded

What breaks

Fuel & Propulsion 297 27.8%

Electrical System 281 26.3%

Transmission & Drivetrain 97 9.1%

Lights 60 5.6%

Engine & Cooling 59 5.5%

Windows, Mirrors & Wipers 56 5.2%

Body & Structure 47 4.4%

Doors, Latches & Locks 24 2.2%