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  1. Died Suddenly while turning key

    OEM Issues
    I got in the car (2004 Trailblazer 4.2 2WD) and when I turned the key, all the lights came on, cluster, radio, and headlights, for about a half second then everything died. When I tried again I only got a dim Service Engine Soon light which shut off after trying to start. When I turn the key off...
  2. battery light on faint

    02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Need help on this one. My '05 Trailblazer 4.2L I6 has started to show a faint battery light on before ever inserting the key into the ignition. Seems to only do it in the morning after a night of sitting. Just found the 6 month old battery bad and replaced and the faint light still hasn't gone...
  3. Bad computer?

    Audio and Electronics
    Ok, kinda an odd problem. My diagnostics jack under the dash of my '06 TB LT not only shows no codes, but does not power up the code reader. I get the random traction control failure, so there should be something. Is it possible for the car to run with a dead or bad computer? Second...
  4. Cold Starting...

    General
    Went out this afternoon to fire up my '02 Envoy SLT. Temps last night were -20C. When I tried to start the truck it was -14C. Turned over twice then went click, click, click. Clock went to 12:00 but radio stations stayed put. CD changer started making noises like searching discs. Put the...
  5. Charging Issues

    General
    Hi everyone, 04 LT, 170k, 40k on the present battery, when I start the truck it often doesn't charge, battery light is on, sometimes when I start driving it will start charging, other times if I shut the engine off and restart, it will charge normally. Had this problem once or twice a while back...
  6. Starting failure

    Suspension
    :hopeless I have problems with my Trailblazer EXT 2005 4.2L I-6 Engine. When turning the key to the "ON" Position, it would go just fine but when I click it to start, it just won't start. Then when I tried shaking the battery terminals, it started. Then it went over and over again. I just do it...
  7. Intermittent Low Alternator Charge (guage&voltmeter), Intermittant (Just Clicks) Star

    General
    Intermittent Low Alternator Charge (guage&voltmeter), Intermittant (Just Clicks) Star 2002 GMC ENVOY SLE 4X4 Bought the SUV a few months ago. A few weeks later I packed the car and went to leave for a road trip and starter just clicked and then nothing; then clicked again when trying to start...
  8. Changing misfire code - 0305 then 0301 on '03 EXT LT 4.2

    OEM Issues
    Hi everybody, I need some help asap. My battery went out last January in a remote place and I had Walmart replace it. The genius over-tightened the positive terminal and it loosened over time(stripped threads) allowing corrosion to set in. A couple days ago, the terminal finally went...
  9. Battery Replacement

    General
    I have a bad cell in my battery and need to replace it. Which battery do you suggest to get? I don't want to over pay for a high end battery that isn't worth it, or buy a cheap battery that wont last long or work well.
  10. Okay, I give up! SS Trailblazer won't turn over.

    General
    I have been searching the forums on a few sites for a few days trying to find a clue as to what's happening with my TBSS. I promise I'm not the guy that just posts because he's too lazy to look. (I bet after this someone will find the thread I was looking for and call me out, haha) Alright...
  11. 2008Trailblazer sometimes won't start

    General
    Turn the key all lights on, but sometimes the starter does not engage. Installed new battery, changed the Starter relay , worked fine a few days and then it works or not. Removed starter and had it checked at Starter Shop- Starter fine. Any suggestions as to what else could be wrong?
  12. Alternator & Battery Help

    OEM Issues
    I replaced the alternator because it was charging way to high and now my battery keeps dying. I had the battery and alternator test at Advance Auto Part and was told the battery was good just needs to be charged and the new alternator is charging at 15.5v and my battery is still going dead. What...
  13. Sluggish starting

    General
    My TBSS seems like the battery is weak when starting. How do you know when it is the battery and when it is the alternator that needs replacement? THX.
  14. AGM BATTERY suggestions

    General
    Wanted to know whats the best Agm battery for 02 trailblazer LS when I purchased my truck i purchased a red top optima in 2009 and I'm in need of a new one but haven't read much good about current optima batteries so are they now junk?if so whats the best AGM available now ?i intended on going...
  15. Another charging issue

    OEM Issues
    Hey everybody! I have lurked around quite a bit on this site. There is definitely a wealth of info here. Unfortunately I didn't want to make my first post about an issue of mine, but here it goes. I have been suffering from the battery not charging message and the battery light being on. Here...
  16. No power!!!

    General
    Hey! Alright so this is my first post on here so ill try to pass along as much info as I can. I have a 2006 trailblazer lt 2wd. I have owned for a few years now but within the past week I have been having electrical problems. After I turn off the car, I lose all power. I cant even use keyless...
  17. Trailblazer Resetting itself???

    General
    Hey! Alright so this is my first post on here so ill try to pass along as much info as I can. I have a 2006 trailblazer lt 2wd. I have owned for a few years now but within the past week I have been having electrical problems. After I turn off the car, I lose all power. I cant even use keyless...
  18. [SOLVED] Aftermarket Radio Not Working At All

    Audio and Electronics
    I have an 02 Trailblazer and about 3-4 weeks ago I installed a brand new Pioneer FH-X700BT head unit with a GMOS-1 wiring harness. Everything was in working order and sounding great. I was recently having some fluctuation in my RPMs from a cold start so I thought it would be helpful to clean...
  19. A few electrical problems NEED HELP

    General
    I have a 05 Envoy. I have been having problems with the heater, and now it has seem to move to more of the electrical in the truck. In the last week and a half I have had to use a battery charger twice to start the truck. Once I do that and give my dad a ride to work the battery will stay...
  20. Problem with Starting Engine

    General
    I have a 2002 Trailblazer, and it locks out all power and the key gets stuck when trying to start the engine. I can turn the key to accessory and on and everything works (radio plays, lights/gauges come on), but when I try start to the engine there is one click and then everything turns off (no...
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