Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Chevrolet TrailBlazer Electrical Problems



  • I bought a 2004 tb in October used, this has been the worst decision I have made in a long time. The first problem I had with it was 4 days after I bought it. It would not crank, replaced the battery and it did fine. Then, in January, we had lots of ice on the car so I went and cranked to let it warm up and thaw out. When my children and I went to get in it was locked tight. Next, it would not start again, no power to fuel pump. Left it alone for a day and it started working fine. Now it stalled on me and my 3 children while driving. We were able to pull off the road but it would not start. So my husband got it on a trailer and pulled it home. He switched the fuel pump relay and the washer relay (which did not work either) and it cranked right up and the washer started working. This is really becoming a pain. If anyone has a solution please let me know. :lemon: :mad:
  • whatever was the problem? I have the same exact trouble.
  • I am also having many of these problems. How can I contact you with my information and what can you do for me. My car wont start if it sets for 2 days or more. Airbag light occasionally comes on. Mechanic said on-star was pulling from battery so he unhooked that got a new battery and it happened again about a month later. Cruise control stopped working for a while the other day. The seatbelt light flashes when I have my seatbelt on. I have gone through many batteries and a lot of stress
  • gmcustsvcgmcustsvc Posts: 4,055

    I would be happy to assist in setting up a case with GM Customer Assistance. In order to start the process I will need your complete contact information (including full name, mailing address and phone number), VIN, current mileage and the involved dealership sent to me in an email. Also, could you please provide a brief description of the problems you are currently experiencing?

    Thank you,
    Caron, GM Customer Service
  • How do I get help, I am having all kinds of crazy electrical problems with my 2007 Trailblazer
  • 2006trail2006trail Posts: 1
    I had similar problems with strange intermittent electrical issues including airbag light on rear view mirror flickering (i forget the other issues) and then the car wouldn't start. Towed it to dealer and they replaced the ignition starter block. They said they had seen this before and due to the truck drawing so much power (windows, seat heaters, etc) that much carbon builds up causing the metal contacts to wear out.

    After one year + no electrical issues.
  • gmcustsvcgmcustsvc Posts: 4,055

    I apologize for the problems you are experiencing with your vehicle. Could you please email me your VIN?

    To find the email address, please click on the member name (gmcustsvc).

    Thank you,
    Caron, GM Customer Service
  • ro04ro04 Posts: 1
    edited June 2011
    I have a 2005 trailblazer, i have had similary problems that has already been stated. Currently I am having a problem with the drivers' side headlight and passenger side taillight. they both have been replaced with new bulbs but still is not working, preventing me from driving once night falls. Any suggestions?
  • burdawgburdawg Posts: 1,521
    Check the sockets for corrosion and deformation due to heat. These are old problems that have been discussed a long time on this forum since the TB was introduced.
  • gmcustsvcgmcustsvc Posts: 4,055
    If this concern continues, I would recommend having it checked out by your local GM dealer. Please keep me updated on your concerns. Have a great weekend.
    GM Customer Service
  • I have an 07 TB. The heater/ ac fan and cruise control have quite working. It constantly is blowing the fuse for the a/c when it is started. The stabili trak light is constantly on and have also lost power to the passenger side window. Looking for any and all suggestions.
    Thank You
  • chc7chc7 Posts: 1
    My gas gauge is doing the same thing , even after a $600.00 dollar repair. Later on the local news consumer reporter did a report on this problem stating that it is a wiring problem with the fuel pump. Chevy is aware of the problem but has not done a recall.
  • Our 2005 Trail blazer has issues, driving down the road the lights goes out, the horn has quit working, the gas gauge shows empty even when it is full and sometime the speed odometer goes to zero. Any sugestions
  • Please post any outcome/results you receive. I have the EXACT same issues on my 2003 Chevy Trailblazer, but it is a daily issue now - (once it starts, it can be shut down and restarted throughout the day "normally", but once it sits over night, it will not start). I go through a number of different "processes" for it to finally start - i.e. inserting key into ignition, turning to start position and holding for 60 to 90 seconds, release key to "run" position then immediately returning and holding in "start" position, vehicle will typically start within 5 to 10 seconds.
    I have had various ignition parts replaced, but problem still exists. No one can "duplicate" the problem so I troll the forums in search of a solution.
  • Sounds exactly like the problems I was having. Turns out the problem develops when the battery is a little more than half its life time. That is, it starts a little after 2.5 years on a 5 year battery. Rplace the battery an all the problems go away. A couple of Chevy dealers could not figure out why that happens but one tested the battery and 2 out of 5 tests came back with a problem. I don't know what, if anything, the Trailblazer does to the battery but replacing it solved the problems.
  • I have a 2004 Chevy Trailblazer EXT. I recently had to replace the whole instrument cluster panel, because the speedometer, RPM would not work. And of coarse GM did not want to take responsibility for it, even after there are thousands of people having this same issue. My fan doesnt work unless it is on level 5. To top that all off, my gas gauge still isnt working right!!! I see that they recalled them, but not for my year. I even called the Highway Safety Association and filed a complaint. I ran out of gas one day with my three kids in the of whom is an infant with a heart defect that just had open heart surgery. If my son would have had a medical emergency because of his heart, I would not have been able to get him help...and GM would be paying dearly. My son has to go to the cardiologist twice a month, and I cannot even rely on my vehicle that I pay over $300 a month for. I am seriously considering getting an Attorney as well...Will not buy another GM car again :mad:
  • burdawgburdawg Posts: 1,521
    The fan issue is probably the fan resistor. On all the settings except the highest it reduces the voltage to the fan to make it run slower. On the highest setting it gets full voltage by way of a relay. It's a simple repair and not very expensive. See n-my-Chevy-TrailBlazer-111640.aspx
    The fuel gauge is probably the sending unit in the tank. Our 02 has the same issue from time to time. We have gotten into the habit of setting the trip meter to zero whenever filling the tank, and since we know about how far it will go on a full tank we know when it needs to be filled. It only acts up occasionally, it's usually fairly accurate. My Dodge Durango has the same issue, but only in extreme hot weather when the tank is full (it will register empty and set off the alarm until the level is reduced somewhat).
    Sorry about your problems. Complaining to the NHTSA won't help much since these aren't considered safety defects. Good luck with the attorney, it's probably going to cost you more than you'll ever be able to recover.
  • jay250jay250 Posts: 1
    I also have very similar issues with my 2003 trailblazer it rough idles in park in acceleration and at stop basically its a rough ride all the time. could it be another sensor?
  • I try not to write these things mad but…After buying Fords for years; I bought A Trailblazer in 06. At 36110 miles the 5th position on the fan motor quit working. Since then I have replaced two wheel bearings, a three-hundred dollar package deal, an ignition switch (another three-hundred dollar package deal) and enough light bulbs to light up New York.

    I am now faced with cascading electrical failures and burnt wiring harnesses which probably extend throughout the vehicle. My actuator/servo which selects the vents/defrost/lower air direction has both a fried wiring harness and needs a new motor. My back left turn signal needs both an electronic card (why there exists a card in the tail lights seems like poor engineering to me) and a wiring harness. To top everything off, I now have to play ignition roulette again. When I try to start the car, all the lights and other electronics come on but the SUV will not even click. After switching the car on and off 10 or 20 times it starts for the same reason it did not. There is no check engine light and my little code machine only tells me I have throttle body sensor problems (O2). My battery is less than a year old and tests fine.

    The local dealership cannot tell me the root cause for the mass electrical failures but, wants to replace the electronic card/taillight harness, actuator/harness, fan motor/harness for around $1,100. I have not even gotten an estimate for whatever ignition issue which prevents me from starting the SUV. The dealership did not address the issue because they only witnessed the phenomena one time. Apparently they rolled a seven the rest of the time they tried to crank the vehicle. I am an engineer and I understand how high maintenance I can be. It is however, illogical to me to begin replacing hundreds of dollars’ worth of electrical parts which may burn up as fast the previous parts. Call me crazy.

    Has anyone else had these sorts of issues with an 06 Trailblazer? Since I am on my own apparently, can anyone give me a lead on the potential cause of my problems? My instinct tells me to begin looking around the main fuse area first but, I have a feeling many of the wires and harnesses will have the same burnt look. This SUV has less than 70,000 miles and should have lots of life left.
    Thank you in advance for your help
  • blaizer2005blaizer2005 Posts: 1
    edited August 2011
    I recently was in an accident where someone cut in front of my 2005 trailblazer (Hit the car head on)...The passenger light went out... no broken glass, then I reached in and pulled the rubber cover where the bulb is,...touched the bulb connection, and wala, the light now works. But now when I go to start the car, sometimes it just starts, and sometimes I get it to turn over once, but it it won't start. A quick jump gets it going. It could go for a week and no problems starting, but all of a sudden, it needs another jump. Forgot to mention, sometimes that Lamp needs a bang on the front to light and it goes back on again too. Does it sound like the accident caused a short from the Lamp, sucking the juice out of the battery sometimes, and making it time to have to jump the car again? (an electrical problem?) Could the socket be bad now that I fiddled with it to get it to light up?, and need replaced (the socket)? Oh yeah the rubber cap is now missing as if it was jarred loose when I placed it back on and is not covering the light bulb housing anymore. PLEASE HELP! I've jumped this car 25 times in the last 4 weeks. By the way the guy who hit me did not have insurance. Trying to avoid an uninsured deductible of $1K...Thanks...look forward to answers
Sign In or Register to comment.