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#31 of 665 2004 TB electrical problems
Oct 11, 2005 (5:18 pm)
I have a 2004 Trailblazer that continues to have electrical problems. Problems range from the engine momentarily cutting out, to the security light or the check engine light flashing, to the headlights dimming when the vechile shifts. The dealership acts like I am a psycho to bring up these problems and deny they can find anything wrong. They have reprogramed the Trailblazer so many times, it should be able to do it on its own now. My husband talked with one of the service techs who said his sister's Trailblazer had similar problems. I get the sense they do not know how to fix it ... but then they are very dismissive of me any time I am there. Make my husband deal with them now. Have also had problems with a vibration at about 60 mph and an a/c leak. Did I just get the lemon, or is this common????
#32 of 665 Service Engine Soon & reduced engine power sensors
Oct 13, 2005 (11:26 am)
2002 Trailblazer...only 30,000 miles
Here's a good one!!!!
Service engine soon light came on intermittently, then stayed on & reduced engine power light would come on too when car first started in the morning. aAfter car was running a while I restart car & reduced engine power light turns off but Service engine soon light still on. Brought to chevy dealer who put it on the computer & the following codes came up:P0530, P1221, P1634, P1481, P1635. They say main harness is rubbed through & faulty throttle body & both need to be replaced. I take car to my mechanic who does not see any damage to main harness, so thinks it just might be throttle body & orders the part. In the meantime I'm driving my car again & if upon exiting my car I turn on securuty system, all sensors get cleared out & car is running fine. What's up with that? Body control module shouldn't affect fuel system sensors?????
#35 of 665 Re: 2004 TB electrical problems [hadnor1]
Oct 20, 2005 (7:22 am)
Wow. Hate to say it, but glad I'm not the only one with all the Trailblazer issues. I posted my woes about my 02 TB with the electrical nightmare. Since then, the rear liftgate has stopped locking (as in...doesn't lock at all!!!) The alarm doesn't sound when ANY door is opened (including liftgate--how secure) Rear windshield wiper stopped working. Front windshield wipers pause half way down the windshield, engine stalls in reverse intermittently, keyless entry stopped working all together, loses power when you step on the gas too hard, shifting VERY hard from 1st to 2nd gear. I think they are ALL Lemons!!! The dealer I go to says that the BCM needs replacing, but, they wont guarantee that'll fix it. "could need to be flashed or need some new relays" is the best diagnosis I could get. ARGH!!!
#36 of 665 Fuse or relay location
Oct 23, 2005 (11:21 am)
Cannot find the fuse and/or relay for the rear wiper in my 2002 Trailblazer. Does anyone have that information? Wiper does not work. Testing with a voltmeter shows constant 12 volts at the wiper motor connection but nothing on the third does not energize in any switch position.
I opened the electrical panel under the backseat and was surprised to see a green wire snaked into the panel and clipped into one of the fuses. The wire was pinched flat by both of the panel covers. It appears that this band-aid was done at the factory.
#37 of 665 Re: Service Engine Soon & reduced engine power sensors [laurie22]
Oct 24, 2005 (6:35 am)
OK here's an update- replaced the throttlebody & "reduced engine power" light went out but "service engine soon" still coming on. They figured it was actually a "bad computer" now instead. They replaced the computer & everything was fine
but the next day "service engine soon" light came back on. Everyone is baffled!
#38 of 665 Re: 2004 TB electrical problems [hadnor1]
Oct 24, 2005 (3:13 pm)
We recently WON!!! our Lemon Law case against GM. Vibration is more of a idleing problem. We were plagued with service engine lights, Stalling, A/C problems and a drive shaft being replaced twice. The dealership said the loud ping noise coming from the drive shaft was normal. They replaced my entire fuel system including fuel injectors and cat converter. I had to stay on their butts about all of it. The Texas Dept. of Transportation decided we had had enough. Let me know if you need anymore info.
#39 of 665 Re: 2004 TB electrical problems [shanrob]
Oct 25, 2005 (12:42 pm)
Can you tell me more about the vibration. My '02TB has a chronic vibration at 40, and 55-60. No one can tell me what is going on. The dealer has turned a deaf ear to it. What vibration did your TB experience. What was the problem ?. I want to sell it but I really like it.
#40 of 665 Re: 2004 TB electrical problems [wacky174]
Oct 25, 2005 (2:56 pm)
yours sounds like a tire problem. My problem was never acknowledged by GM. They said if there is not a code on the computer, there is nothing to fix!!! Mine actually stalled while at a traffic signal several time. at the time it was running rough. It is all theirs now!!!!!!!!!!