2009 Chevrolet Trailblazer: headlights failing or too dim

Filed Jun 28, 2026 · Electrical, Lights · TN

My first complaint is that headlights, low beam, would not work. Only high beams worked. The issue stopped, unexplainable, on its own, has not occurred again. The 2nd complaint is the radio volume would 'slip' as if there were a loose wire to the speakers, and loss of sound became more frequent and for longer periods of time, eventually all sound stopped, it has not been fixed, as of yet. 3rd complaint, a brand new battery, in under a year of use, went completely dead, without any visible explanation. When an attempt to jump start the vehicle the cables from another cars battery were touched at my cars battery, it sparked, indicating to the person performing the task, there is a 'short' somewhere in the wiring system. I drive this vehicle less than 3000 miles per year, and use it sporadically with my second vehicle to keep the batteries active. I cannot explain why these issues are occurring but thought it important to mention them to other possible victims with the same issues.

Filed Sep 24, 2018 · Lights · 136,731 miles · MI

Tl* the contact owns a 2009 chevrolet trailblazer. The contact stated that the headlights and daytime running lights failed to operate. The contact had to use the high beam headlights to drive. There were no warning indicators illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was 136,731.

Filed Nov 3, 2017 · Lights · 157,654 miles · TX

While driving the low beam headlights will go out. And not come back on you have to turn on high beams to have headlights stopped and pulled over turned off the vehicle turned it back on and low beams still did not come back on

Filed Feb 24, 2017 · Lights · 85,000 miles · AZ

The low beam headlights keep going out. All other lights stay on and the high beam lights work. Only the low beam headlights are affected. This has happened while in motion and from a stopped position when first starting the car and putting it in drive. I have researched it on several group we sights and found that the problem is the headlight dimmer module (hdm). I have replaced this two times over the last two years which always fixes it for about a year then it starts failing again. This is a very dangerous situation because it happens after dark. I can pull over and stop, open the hood and take off the fuse box cover and remove the hdm and put it back in the socket. Sometimes this works and sometimes not. It is a dangerous situation. There have been recalls on earlier trailblazers but not this year. It should be included.

Filed Jul 16, 2016 · Driver assistance, Electrical · 30,000 miles · FL

The headlights have failed. All the lights blink while you ride along. The two back doors will not lock or unlock and the front doors are starting to not lock or unlock properly. The items that let you know when a tire is low in air are failing. The last one costing over $100 to fix. I am getting very upset with the electric parts in this trailblazer. This has been going on since purchase. As a photo I can send you a photo of the vehicle.

Filed Feb 29, 2016 · Electrical, Lights · 80,000 miles · CA

Tl* the contact owns a 2009 chevrolet trailblazer. While driving 65 MPH, the headlamps failed to illuminate. The contact had to activate the high beam lights in order to continue driving. The contact learned that she needed to replace the fuse. The vehicle was repaired, but the new fuse only lasted six months. The vehicle will be diagnosed again per the manufacturer. The approximate failure mileage was 80,000.

Filed Feb 1, 2016 · Lights · 60,374 miles · MI

Tl* the contact owns a 2009 chevrolet trailblazer. The contact stated that the headlights failed. The contact replaced the headlights bulbs several times however the failure was not corrected. The vehicle was taken to an independent mechanic where the failure was unable to be determined. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 60,374.

Filed Dec 31, 2015 · Lights · 66,050 miles · SC

Tl* the contact owns a 2009 chevrolet trailblazer. While driving approximately 40 MPH, the low beam headlights suddenly shut off. The light bulbs were replaced, but the failure continued to occur. The cause of the failure was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 66,050.

Filed Dec 17, 2015 · Lights · VA

My wife was driving home from work at night and the headlights went off and did not come back on by the time she got home (approx. 15 min.). She was on a busy city street which also involves some sharp turns as the drive progresses toward home.

Filed Jan 22, 2015 · Electrical, Lights · 81,600 miles · AZ

While driving at 30 MPH, low beam headlights went out. High beams functioned and fog lamps functioned. Drove app. 5 miles and pulled off road and turned the car off. Turned the car on and the lights still did not function. Left the car for 2 hours and returned. Started the car and lights went on for 1 mile and then went off again. The lights went on again the following day for less than a mile of driving.

Filed Dec 1, 2014 · Lights · 83,000 miles · AL

I just saw the recall gm is doing for the 2006~2007 chevrolet trailblazer. I noticed that other years are not affected specifically mine. My 2009 trailblazer currently has this issues, both low beam head lamps do not work. I have tried everything to get them to work. I have had no luck. Please investigate this issue further. We have to drive with our high beam lights which could possibly cause an accident. Thank you

Filed Oct 29, 2014 · Lights · 44,300 miles · NC

Traveling between 50 to 55 MPH. Headlights started to dim and flicker. On 10/29/2014, was traveling home from work at night and the headlamps went out without warning. Traveled with hazards on for approximately five miles before headlamps came back on. Not sure what the issue may be.