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Chevrolet TrailBlazer Electrical Problems

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  • The part number is the same as the relay, 15016745 and it was the #46. I got mine at Napa about $40, took a day to order.
  • I have a 2004 Trailblazer which I purchased new, within the last few months have gone through 5 batteries, 3 parasidic draw tests as well as an alternator test and have come up with no fix.Mechanics only suggestion to "TRY" and find problem is to get it towed to them next time it just dies???? I do see several posts with people having the same fustrating problems and none with concrete resolve to this issue. Does a recall exist somewhere on this ongoing Trailblazer problem?
  • I had similar problems...after about a year and a half of continuous attempts to fix the problem, new battery, new altinator among other things, I discovered that the yoke on the steering column where the keys go into was set off. So when I turned off the vehicle and removed the keys, the yoke was off and continued to drain the surface charge off of the battery. I had a friend mechanic take off the yoke and reset it so it did not continue the charge. I have not had to jump my vehicle for about 9 months now. No continuing problems since reseting the yoke, though now that i said that it will probably fall apart now. Let me know if this works for you.
  • Also when you turn off the vehicle and remove your key look to see if the red battery light is still lit. That indicates a continuous draw on the battery. I was told the same thing by mechanics to tow it in when it doesn't start. not realistic.
  • My 2006 trailblazer has serious electrical issues all of a sudden. I thought it was the alternator or the battery. took it to my mechanic and he said that both of those were fine. every time i slow down and stop for things like a stop light all the gauges become unreadable and bounce around. I usually have to keep one foot on the break and one on the gas slightly so my car doesn't die all together. also when i'm driving i could be fine for 2 months and than all of a sudden out of no where i'm driving down a highway and wham lights go out and i cant see anything and have to pull over and wait for them to turn back on. Does GM plan on doing anything about this since it seems to be a common problem? I have always been a loyal customer to gm and would hope that something gets done about this or else i will never be buying another gm car again. pretty terrifying when your driving in the dark on a freeway.
  • We all know what you mean about the many electrical issues especially on our Trailblazers. The low beam headlights going out is such a common problem that you'd think GM would resolve the issues once and for all with all the complaints. Alas, all we can do is hope. I been extremely satisfied with my 02 Trailblazer as I now have over 315,000 miles on her and she looks and runs great. Have many of the little issues like the headlights and funny as this remark sounds I believe many of the problems with the TB's can be related to heat or cold weather causing havoc with the cars electronics.

    Anyway, when your low beams go out use high beams as a back up.

    I believe the fix has been to replace both the #45 & #46 fuses. Haven't done that yet myself as I just keep switching to my high beams and eventually the low beams will come back on.

    Good luck.

    Ditto on the ugh!
  • Well im so fed up with this truck whi le driving to work it suddenly lost power then regained power but was driving weird the speedometer is reading im driving 70mph when I prob was doing the most 25. im hearing this is going to cost me over 500$ . This will b the 2nd time this is replaced lucky the dealer I purchased it from took care of it the 1st time but that wad a year ago...so im sol this time..... I just replaced the tramsmission....alternator, starter, ignition switch all this year. This is,insane I hate this truck pure money pit.....can afford another car right now ;( :mad:
  • You might want to have them check the connections in the dash or the dash motor assembly. I had some of the same issues and the lights fading stopped as soon as my mechanic found some loose connections in the dash and tightened them. I've also had the speedometor go crazy and while searching on the internet for a solution I read that the dash motor can cause all kinds of problems if it goes bad. GM had a refund set up for 2005's and newer. If I can find the info on this again I'll re-post. Or you can search for it by looking up trailbazer dash motor problems.
  • OK GREAT!!!! THANKS
  • Sarah @ customer service: We are senior citizens and our 2006 trailblazer only has 60,000 miles. Recently, we are also having this problem. Our Trailblazer is shutting off while driving down the road. This is very dangerous and has put us in very dangerous situations. We have taken it to get checked by a mechanic. The mechanic believes it is the computer system that is causing the problem. To fix this problem is going to cost us over a $1,000.00.
    Do you have any suggestions or advice for us. Apparently this is a major issue with these Trailblazers!!!!!!
  • burdawgburdawg Posts: 1,524
    "The mechanic believes it is the computer system " I wouldn't fork over $1000 for a repair that someone "believes" would fix my problem, unless they agree to refund the money if it doesn't help.
  • frzdawnfrzdawn Posts: 15
    edited January 2012
    hi i have a trailblazer a 2004 and i purchased it at 70,000 miles by the time it got to 70,500 the computer died on the truck when the dealer was changing the oil .... i was told that the computer have a lifetime warranty on it i had to pay for the wiring which cost my 200.00... btw this truck is on the list of the most unreliable trucks in the us. im defin not suprised at all ...it has been a true money pit... thank god im in the middle of purchasing a new car ... 3 yrs with this truck is wayyyy to long i damn near rebuilt this truck .. and its still begging for more money :sick: :mad: :lemon:
  • mccombs619mccombs619 Posts: 1
    edited January 2012
    I HAVE MANY OF THE SAME PROBLEMS ON MY 2006 TRAILBLAZER HAVE HAD DEALER REPLACE SO MANY THINGS I HAVE A BRAND NEW VEHICAL THAT DOES NOT RUN. ALL STARTED WITH WHEN MY ECM WENT OUT THE ONE THAT NEVER GOES OUT IT THROWS SO MANY CODES THAT THE DEALER TELLS ME HE DONT KNOW WHERE TO START. SAME PROBLEMS WITH LIGHTS. I WAS SHOWN A BULLETIN AND TOLD IT WAS NORMAL. EVEN HAD A DOOR MODUAL CATCH FIRE WISH I WOULD HAVE LET IT BURN. NOW AFTER DOING A COMPLETE OVERHULL ON FRONT END IT WILL START THEN SHUT OFF THEN NOTHING THEN WILL START RUN FOR A FEW THEN SHUT OFF THEN AFTER A FEW TRYS MAY START OR NOT. WHEN IT DOES RUN ITS REALLY RUFF. ITS FUNNY NOW THE DEALER TOLD ME ITS THE ALTERNATOR CAUSEING IT NOT TO START HAVING IT TESTED TOMMOROW JUST REALLY DOUBTFULL. JUST DONT KNOW WHAT TO DO WOULD LOVE TO JUST GET RID OF THE SCRAP BUT JUST DONT WANT TO GO INTO DEBT AGAIN LOVE THE VEHICHAL JUST DONT KNOW WHERE TO GO FROM HERE ANY SUGGESTIONS BEFORE I LEAVE CHEVY FOREVER. DID I BUY A :lemon: 3 YEARS AGO GUESS NOT SINCE THERE IS SO MANY OTHERS HAVING THE SAME PROBLEMS. GM NEED TO ADDRESS THESE PROBLEMS.
  • I have 2005 chevy trailblazer LTZ. i have recently purchased it as used car. i was driving suddenly a messaged poped up on DIC thats said low oil pressure i checked oil it was okay after cooling. it pops up i dont know y. i have changed oil but still no use. please guide me why this warning pops up is it an electric problem or something wrong with the engine. pls help meeeeeee
  • n212n212 Posts: 1
    my 2005 Trailblazer has the same problem. First the instrument panel, then when using the defroster the car just dies, then both headlights just quit working. What is the $40.00 part and where can I find into on how to fix it?
  • My 2002 TB ignition will intermittently not work. It may go for days and work fine, then, for no apparent reason not work. The battery is fine; all the dash lights come on when I turn the ignition switch. I sometimes have to engage the ignition switch 50 or more times before the ignition catches. It may start fine for the next few times that I start the car, then once again it will take 50 or so tries before the ignition will catch. My mechanic has tried multiple times to diagnose the problem, but with no luck. Has anyone else had this problem?
  • I have a 2005 EXT that is doing the samething. I have not taken it to a mechanic yet but I am going to make an appointment because my speedometer is also not working properly.
  • Just recently after turning off ignition the driver side door doesn't lock with remote, only manually. Driver side panel also fails to operate any/all windows. Other doors lock normally when alarm/lock is clicked. Also after turning ignition off the radio would stay on for some time, now it doesn't, and btw my fuel & water pump took a dump last summer. Any guesses or suggestions?
  • I am also having many of these problems. My car wont start if it sets for 2 days or more. It starts with the radio resetting. It just happened this am, I stopped on the way to work, got back in my suv turned the key. I heard a weird gear noise then the radio clock reset. This has happened intermittently for the last 2 years. I have had the security system reset twice because the car will not jump start and I can't get the key out. I have gone through many batteries and a lot of stress, mechanics say its not the starter, its not the battery. BUT clearly it is something. please help
  • topps4metopps4me Posts: 2
    edited February 2012
    I bought it with 25k mile in 2007. In 08 the check engine light comes on and the codes read cam sensors. I take it to Chev and they replace the cam sensor, cam actuator and fuel gage in the tank get replaced and $726 dollors later I have to return the car 3 days later the same codes and the fuel gage reads empty. They have the car another day and they replaced teh fuel gage with a faulty one and say the cam issues are the car needs regular oil changes. Well per the owners manual I replace the oil when the sensor tells me or 5k miles. So the light has remained on since and I can not get the car smogged. Now I live in a county that requires a smog and no way to get this hunk of chevy crap fixed. Pretty sad when the dealer blames the problem on an oil change. By the way I have had pretty much all the electrical issues listed in the fourms but they have been intermintent.
  • I have a TB 2003 and I have many of the same problems I read about.

    Head light off
    Can’t remove the key
    4x4 change by itself
    Can’t open passenger door or back door
    Music volume control

    I read also that you are in GM CustSrvcDptm, will you direct me to the solution?

    Thanks Rafael
  • mde1mde1 Posts: 1
    You get to blaze a new trail when you are on the road!
    Ok...low beams go off and on at will. Replaced all fuses, had so much service, checked wiring, problem still happens and we can't figure out why. On a cross country trip, we spent more time in Chevy garages than on the open road! New plugs, new filters, new ignition switch, and lots more. Now the Check Engine Light is still lit, lights still go off, and now...when we add gas, the car runs rough for the first few minutes! Sometimes even stalls! The right hand outside mirror is frozen in space. But most of all...we can't run it in two wheel drive. NOISE comes out like as if we are popping popcorn! We had a complete new transmission several years ago. Chevy garage is no help...since it is all intermittant! HELP! we spent over $6000.00 on the road getting it road worthy enough to drive through the Colorado Mountains and Reno Mountains! Still not running right. HELLLLLLP
  • Hello All, So a few days after I posted Any one want a 06 Trailblazer?? I got rid of the piece of crap. I got a dealer to give me 10k for it only owed 7 so by by hunk of crap. I think that is the only way to fix it give it to a dealer. Hope they enjoy it!!!!
  • My AC was working on/off again, started with one speed, then another now it is dead. My low beams go on and off when ever they like and my OnStar is starting to send emergency impact notifications. I was in my car at work listening to the radio, eating lunch when OnStar comes on asking if I am okay and saying they show I was in an accident.
  • nbarrington,
    i have the exact same car and problem. i've changed the battery, ignition switch, fuse panel, relay module all with no solution. starter checks out fine. chevy dealer says they can find the problem because they can't duplicate it.

    it's obviously electrical but what the heck is going on? i would love to know.

    any info would be great. i think it's between the fuse panel and the starter.

    billberke
  • billberkebillberke Posts: 3
    For what's it's worth, the answer to the problem was the starter motor itself! Although it tested ok it was an intermittant failure. After Chevy charged $350 for a starter switch, another $500 for the module and entire fuse circuit board, the same problem persisted. It's a good thing I didn't change the key tumbler, the next suggestion. Finally just by replacing the starter motor (not at Chevy service) it cured the problem. I had been suspicious of the starter because the problem was sensitive to temperature and humidity but Chevy said their techs best guess was to change out the above items. I wonder why?
    All is well now and I'll keep the beast until it dies.
    Bill
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964
    Good morning Bill,

    I apologize that the different components replaced by our dealership did not resolve the concerns you had been having with your Trailblazer; it's good to know that you were able to find the root of the problem (the starter motor) and that everything is back up and running.

    I wish you many more happy miles!
    Sarah
    GM Customer Service
  • billberkebillberke Posts: 3
    Thank you for your response. I'm glad you and Chevy show signs of concern. I must say that my issue was well documented as I searched through ciberspace for the answer. Chevy service centers should have a bulletin recommending changing out the starter before they do anything else. It would be nice to get a refund or credit on the money I spent on needless parts but at least it wasn't a heart and liver transplant only to find out it was my gall bladder that failed.
    Bill
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964
    Hello Bill,

    If you're interested in pursuing a refund, I would recommend speaking with your dealership. However, one of the considerations when evaluating different cases is whether or not you as the customer have invested money through our dealerships into your vehicle repairs. While this does not guarantee any end cost assistance as it is just one of many different variables we look at, it definitely does contribute to the case. Should anything arise in the future, please do let us know.

    Regards,
    Sarah
    GM Customer Service
  • cyn1154cyn1154 Posts: 2
    Thank you so much for posting your process in finding the electrical starting issue. I have just started having this issue about 2 months ago. My mechanic has been unable to find any problems that would cause it to not start and not to charge. At this rate, it is hard to plan to go anywhere without knowing I can have a charge-up if needed -- even then hasn't always worked. Very Frustrating! Instead of being lead down your long and expensive road, I will start with the starter motor. Thanks Bunches!! :)
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