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Body and structurePart report

2003 Chevrolet Trailblazer EXT Body and structure Problems

Complaints
20about this part
Share
6%of 313 total for the year
Median mileage
43,268miles
Trend
StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.

NHTSA recorded 20 complaints about the body and structure of the 2003 Chevrolet Trailblazer EXT, 6% of the 313 complaints for this model year. Where a mileage was given, the median is 43,268 miles.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“Driving approx 70mph on the highway, suddenly heard a whap whap whap noise coming from the back of the vehicle. I slowed down, and the sound diminished. Arriving home, I found that the center brake light assembly had come loose at both ends. The two center connections luckily held, or else the piece would have come off the car and possibly caused an accident. I have read that other trailblazers have had the same issue.”

NHTSA complaint #10475663, filed 2012-09, 139,000 miles

“While driving down highway started to hear a banging noise turns out it was my plastic that's above my hatch where my 3 red brake light is it hasn't fallen off yet just loose and flopping around I have read this happens to a lot of trailblazer this should be a safety recall on this and even you guys are aware of the problem the molding which is double sided tape is not a proper use for this the company should have to fix it is it gonna take one flying off and causing a death and major accident before anyone does something?”

NHTSA complaint #10558291, filed 2014-01, 156,000 miles

“The roof rack to my 2003 Chevrolet trailblazer blew off while driving home from the shore on the atlantic city expressway. There was no prior damage or accident to the vehicle to cause such a problem. We were informed that our car was not the first case. The dealer did fix the roof rack but I'm concerned that it will happen again if no adjustments are made to the design. There is a glue strip that holds the bottom portion in place. This is an accident waiting to happen.”

NHTSA complaint #10166376, filed 2006-08, 15,800 miles

“My 2003 chevy trailblazer has a third brake light across the top hatch .while driving down a busy highway it was flying like a wing on the back of my vehicle luckily DOT falling completely off but when I stopped it came crashing down onto my window of hatch luckily not breaking all I could do is break it completely off so it would not fly into someone's windshield behind me I work with a lady with the same make and model and hers flew right off her latch causing it to smash luckily no one was behind her. …”

NHTSA complaint #10202853, filed 2007-09, 71,700 miles

“High mount rear stop tail lamp assembly is loose. Opened the tailgate on 5/11/09 heard metal crunching. Ever since my back glass vibrates violently when going down the highway, increasing the possibility of it blowing out. On 5/17/09 after further investigation noticed that the top assembly has broken away from the truck on both sides (still being held on by the center) should this come off it puts me and drivers behind me at risk of an accident. This problem puts my children at risk of glass shattering on them or being involved in an accident. …”

NHTSA complaint #10268989, filed 2009-05, 52,000 miles

Related service bulletins

Body and structure: other model years

YearComplaintsShare of year
200695%
200473%
2003206%
200255%

Other parts of the 2003 Chevrolet Trailblazer EXT

Fuel system
89 complaints
Electrical system
77 complaints
Transmission and drivetrain
49 complaints
Visibility (wipers, defrost, mirrors)
26 complaints
Exterior lighting
23 complaints
Engine cooling
16 complaints
Brakes
13 complaints
Latches, locks and linkages
13 complaints
Suspension
12 complaints
Other or unknown
7 complaints
Vehicle speed control
7 complaints
Steering
6 complaints

← All problems reported for the 2003 Chevrolet Trailblazer EXT

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology