Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety. Notes: It would be ill-advised to blaze any trails with the 2004 Trailblazer. Its faulty fuel gauge could leave you stranded.


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
34,867 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.

2004 Chevrolet Trailblazer lights problems

lights problem

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2004 Chevrolet Trailblazer Owner Comments

problem #16

Jan 142014

Trailblazer 8-cyl

  • Automatic transmission
  • 112,500 miles


The contact owns a 2004 Chevrolet Trailblazer. While driving at an unknown speed, the low and high beam lights failed on the vehicle. The failure occurred two M ore time. The vehicle was not repaired and the manufacturer was not notified. The failure mileage was 112,500. Updated 09/16/14

- Altair, TX, USA

problem #15

Mar 012011

Trailblazer 6-cyl

  • Automatic transmission
  • 69,000 miles
The contact owns a 2004 Chevrolet Trailblazer. The contact stated that the instrument cluster was defective. The speedometer did not indicate the speed in which the vehicle was traveling and the tacometer was also defective. The vehicle was not taken to have the failure diagnosed or repaired. The manufacturer was notified, but denied any assistance with the repair of the vehicle. The contact also stated that the front drivers side headlight would constantly burn out, causing the headlight to melt and emit smoke. The failure mileage was 69,000 and the current mileage was 72,000. Updated 09/19/11

- Anchorage, AK, USA

problem #14

Jun 142010


  • 65,120 miles
I have a 2004 Chevrolet Trailblazer and have had to have both headlights replaced several times over the past year. My dealership has said this is a recurring problem they have been experiencing with Trailblazers that are brought in.

- Cedar Falls, IA, USA

problem #13

Apr 172010


  • 24,500 miles


The contact owns a 2004 Chevrolet Trailblazer. While driving at speeds of 45 mph, the headlight failed. After several moments, the headlights resumed normal operation. This was the second occurrence of the failure. The vehicle was not taken to the dealer for a diagnostic of the failure. The VIN was not available. The failure and current mileages were under 24,500.

- Loveland, CO, USA

problem #12

May 142009


  • 122,000 miles
The contact owns a 2004 Chevrolet Trailblazer. While driving 45 mph with the automatic headlights on, the low beam headlights failed without warning. The contract drove into the emergency lane and turned the high beams on. The vehicle was taken to an independent mechanic for inspection. The technician was unable to duplicate the failure. The vehicle has not been repaired for the malfunction. The failure mileage was 122,000. The current mileage was 124,000.

- Orange Park , FL, USA

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problem #11

Jan 192004

Trailblazer 6-cyl

  • Automatic transmission
  • 9,000 miles
The contact owns a 2004 Chevrolet Trailblazer. The contact stated that the instrument panel has not worked since she purchased the vehicle brand new in January of 2004. The warning indicators are constantly illuminated. She took the vehicle to the dealer several times while it was under warranty, but they could not locate the failure. Due to the failure, she does not know how fast she is driving, how much fuel is in the vehicle, and cannot read the odometer. Recently, the headlights failed and she took the vehicle back to the dealer. The dealer charged $91 to diagnose the failure, which produced a failure code at the headlight low beam relay cluster switch. The dealer replaced the low beam relay switch and ignition switch, but the failure persisted. Now that the vehicle is out of warranty, the dealer has finally located a diagnostic code for the instrument panel failure. The dealer stated that the instrument panel cluster failed and would cost $600 to repair. The failure mileage was 9,000 and current mileage was 68,000. Updated 4/14/09 the air bag light illuminated. Updated 04/17/09.

- Thibodaux, LA, USA

problem #10

Apr 032008

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 99,000 miles


My passenger side head lamp shorted out. On 12.31.07 I took it to the dealer and the replaced a burnt and charred connector. On april3, 2008, the head lamp again malfunctioned. During the three months I noted at least 10 other Chevrolet Trailblazers with in non-operating passenger side head lamp. The service manager at the local dealer advised me that the have seen this problem on other Trailblazers. I travel at night and this is a safety issue.

- Topeka, KS, USA

problem #9

Jan 012003

Trailblazer 4WD

  • Automatic transmission
  • miles
Headlights dim, battery gauge bounces back and forth to positive and negative.

- Anchorage, AK, USA

problem #8

Dec 102003

Trailblazer 6-cyl

  • Automatic transmission
  • 250 miles
Whenever I drive at night the exterior and interior lights flicker and sometimes go out completely when I brake or allow the truck to coast. When I use the gas the problem resolves but since I have to stop sometime this isn't a good fix. The electrical gauge on my dash fluxuate with the lights going from low to high and back again. I've taken into 2 dealerships but they "can't duplicate the problem" I work nights so I am driving mostly during the night. How is it save for a young woman to drive alone at night without lights? this is an ongoing problem that has happened since I purchased the truck and has not been resolved.

- St Cloud, FL, USA

problem #7

Jul 012007

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 36,000 miles
The contact owns a 2004 Chevrolet Trailblazer. The contact stated that the headlights flicker when they are activated. The lights only flicker upon deceleration. The dealer stated that the cause of failure was the ECM. The contact informed the dealer not to repair the vehicle. The current mileage is 36,167 and failure mileage was 36,000.

- New Albany , IN, USA

problem #6

Oct 202006


  • Automatic transmission
  • miles


Headlights blink while driving and speedometer and tachometer stopped working.

- Holly Springs, MS, USA

problem #5

Sep 012005

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • miles
I was just reading the complaints & thought I would submit a few of my own. Gas fillling is always a task as tank always seems to "overflow" & gas sprays out everywhere. I was told it is because of the type of filler line that GM uses. Headlights constantly going from normal to dim, to dimmer, then back to normal, regardless of driving conditions. Saw the one from the person being shocked, this too has always happened to me since the first day I bought the Trailblazer. If I touch the metal of the door upon exiting the vehicle theres a large jolt from static electricity I assume. The arc from this jolt is very visible & I estimate it to 2 inches in length at times (longer your in the vehilce...bigger the arc). All the rubber trim on the backhath has come off. Plastic lining used on fenderwells constantly coming loose & must be reatached. Carpet around pedals has all come loose. I bought this vehicle Nov. 1 2004 & it is hardly been driven with only 6,000 miles yet seems to be falling apart already.

- Washington, IN, USA

problem #4

May 202006

Trailblazer 4WD

  • Automatic transmission
  • miles
When headlamp burned out it was discovered that the plastic connector that the bulb plugs into had burned and melted.

- Des Moines, IA, USA

problem #3

Mar 202006

Trailblazer 6-cyl

  • Automatic transmission
  • miles
While driving at night, I noticed the dash lights dim and headlights dim at the same time. The lights then immediately flicker back to normal nighttime lights. It appears they are flickering between daytime and nighttime settings. When I took the car to the dealer, they could find nothing wrong.

- Brighton, CO, USA

problem #2

May 052005

Trailblazer 4WD 8-cyl

  • Automatic transmission
  • 10,000 miles
The contact stated the headlights were flashing on and off. The contact took the vehicle to the dealer three times. The dealer stated that this was normal activity. No cause has been determined. The manufacturer was contacted. They offered no free remedy. Updated 12/27/05.

- Auora, IL, USA

problem #1

Jan 092005

Trailblazer 4WD 6-cyl

  • Automatic transmission
  • 10,500 miles
Blower will go on by itself when manually turned on, the blower will go off for a few seconds and back on. The back windshield wiper will go by itself, the clock will turn to 12:00 when turned off, headlights flicker while driving, when using anything electrical in the car such as the electric windows, the head lights dim.

- Waterbury, CT, USA

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