hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
62,870 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2003 Chevrolet Trailblazer EXT lights problems

lights problem

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2003 Chevrolet Trailblazer EXT Owner Comments

problem #9

Jan 022014

Trailblazer EXT

  • 156,000 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?

- Quincy, IL, USA

problem #8

Aug 292008

Trailblazer EXT 6-cyl

  • miles
I am a senior citizen I brought this car new. After one year I had to replace linc plate. Over the years everything has gone wrong with this car. Speedometer has not worked since Aug. '08, gas gauge stopped Oct. '11. Instrument cluster since 2010 and GM knows this is a defected part. Yet GM paid for this same defected part at their cost for the Tahoe, but has not paid for the trailblazer. Why? windows and doors do not unlock on command. Window wiper(rear) stopped working-I replaced that part. A/C comes on my itself. Thermostat failure. I think GM should stand behind their product. The only reason they would not is that they already know that they are producing substandard products that are not fit to be driven on the road.

- Huber Heights, OH, USA

problem #7

Jan 152011

Trailblazer EXT

  • 5,000 miles
Continuing failure of rear lighting (back-up, brake, driving, and turn). Typically, I have to replace a bulb about every 6 weeks, and the entire left assembly has been replaced twice since the car was new. Bulbs and sockets melt until they are inoperable. Similar issue with front headlights, although only about once a year. Old bulbs and assembly disposed of, but I'm sure more melted ones will be available soon.

- Rome, GA, USA

problem #6

Aug 162010

Trailblazer EXT 6-cyl

  • 110,000 miles


My 2003 Trailblazer ext lost its third brake light, which fell off (for the third time). The entire housing flew off, and it was lost. Also, the passenger brake light will not work, even after replacing the control board and bulb.

- Lexington, KY, USA

problem #5

Aug 102009

Trailblazer EXT

  • 90,000 miles
Headlamps keep going out and the connectors keep melting and burning the rear radio speakers go out the rear heat/air goes out the level 5 setting on the fan does not work these are not unusual complaints for this vehicle, there seems to be a standard being set with these issues.

- Brooklet, GA, USA

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problem #4

Aug 112009

Trailblazer EXT 6-cyl

  • 89,500 miles
Purchased a 2003 Chevy trailblazer-ext lt in Dec 2002 from the dealer, team Chevrolet in pasadena. Since purchasing the vehicle, there's been several recalls, one in particular that keeps recurring are the brake lights keep burning, the dealer changed both units but it keeps burning out. I got tired of taking it to the dealer, so I purchased new bulbs and looked into replacing them myself. However when I unscrewed the bulb, I noticed the bulb just didn't burn normally (like a home lamp) it looked more of an electrical issue, the lining of where the bulb is screwed in looked like it had white residue and it smelled smoky. Also, don't know if its the shocks or suspension, makes odd noises. Dealer said its fine, but the noise is still there.shorly after my engine light turned on...the dealer could not figure what was wrong after a 2 to 3 week and costly expense and time...they switched out the gas tank...come to find out, that wasn't the problem, the engine light turned on again, they said one of the pistons needed replacing...$$$ that was a big expense and time consuming... everytime I took it to them it, something was fixed, they charge, I pay, and the engine light would turn on, it got frustrating. Till, they finally got it right. Now my car sounds horrible (shocks/suspension noise got worse) when I go over city bumps or driving even small like hills, and mind you, which is driven by myself (female 124lbs) it shouldn't squeak or make noises, the brakes pedal makes a noise when I place my foot on it....yes it has 90K miles and it's an 8 year old car, but I kept up with the maintenances, I've taken it to the same dealer since it was purchased, only drive it to and from work....the car is in good condition, no hit/scratches/no tears.... I can't explain why.... are there any other recalls, the dealer isn't aware of"?? for instance they were not aware of the gas tank recall..which they were charging me over $1200 to repair, how can I trust they are doing their job"

- Los Angeles, CA, USA

problem #3

Sep 272009

Trailblazer EXT

  • miles


I have two problems: When driving at night, headlights go off, not way to see, other than put on brights. Rim, broke to small pieces, had just gotten off I 95, was on off ramp when the car started making a very loud and scary noise, we had two small children onboard. Had this happen while on I 95 we could have all been dead.

- Sumter, SC, USA

problem #2

Nov 162007

Trailblazer EXT

  • 98,000 miles
Every few days when I use the turn signal all lights will flash as if the hazard warning lights have been activated. This is exactly like the GM recall for the 2003 Chevrolet trailblazer however my VIN is outside of the recall.

- Bloomington, IL, USA

problem #1

Nov 042004

Trailblazer EXT 4WD 6-cyl

  • Automatic transmission
  • 17,327 miles
Left driver's side outside mirror is not holding the correct settings, and clicks constantly. The mirror is hitting against something, and turns completely to the ground. When using keyless entry the mirrors also turn to the ground. The mirror is changing by itself, and it is not going back to the correct setting. The mirror is always making a clicking noise and it is facing downward. There is no problem with the right side. The dealer replaced the right side mirror, and from then on the left side has not worked. Consumer has taken vehicle to dealership 4 or 5 times to be checked. Dealership insists the mirror is working fine. But as soon as the consumer leaves the dealership the mirror will work for a couple of hours and then stop working properly. Consumer took the vehicle to the dealership and the mechanic didn't write down the problem with the mirror in his paperwork, and this happened more than once. When shifting from park to reverse the vehicle jerked at times. The engine control module was reprogrammed. The consumer believes that the reprogramming resulted in poor fuel economy. The cd player made a hissing noise. When the brakes were applied they would grind. The 4-wheel drive switch shorted. Windshield wiper motor failed. Right side tag light bulb blew.

- Marietta, GA, USA

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