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4wd

  1. Possible 4WD Issue?

    4x4 Drivetrain
    I have a 2003 Trailblazer. I normally run it in automatic 4WD. I've noticed recently that I get a strange hiccup, usually when cruising at 55MPH down my country road (the same road I drive day in and day out). At first I thought it was an engine miss, but did the tune up and I'm still having the...
  2. *thunking* sound in reverse, 4wd hi

    4x4 Drivetrain
    I recently bought a used 2005 trailblazer and when in 4 wheel drive and reversing with the wheels turned more than half way, there is a loud thunking sounds (I don't know how else to say it).
  3. 4wd not working 2003 trailblazer

    4x4 Drivetrain
    michigan finally got its first big snow of the year so i try to use 4WD, i can bear it clicking and engaging outside the car but there’s no power being sent to the front wheels, there’s no service 4x4 light and the switch will switch to all the 4WD options without a problem, anyone know what...
  4. Binding and cutting out in AWD.....and other issues

    4x4 Drivetrain
    First, thanks for reading my first post here and for any help you might be able to give. I went through the "Please read me first before making a post" in the 4x4 section. I've got a '03 TB EXT with the I6 engine and 230,000 miles. My service 4wd comes on when I'm in AWD and I turn, notice a...
  5. How To Convert A 4wd Trailblazer To Rwd the Questions

    4x4 Drivetrain
    If this isnt the correct section please feel free to move it. Ive currently got a 05 LS 4.2 model & Im searching for another TB,but out of the 100's Ive looked at so far,95% of the ones with lower mileage are 4wd or Awd on the SS models.Since it only snows a few times a year in Nashville,where I...
  6. 4hi/4lo/awd switching on its own.

    4x4 Drivetrain
    My 2002 trailblazer has been switching itself into 4WD on its own. The first time I've noticed this happening was when I was taking a sharp right at a light into a gas station then took a sharp left up to a pump. It was hard to move taking the turn pulling in and then even harder pulling up to...
  7. 4wd Front Diff gets no power

    4x4 Drivetrain
    I purchased my 2002 Trailblazer LTZ with 85k in september, and once it began snowing I realized my 4wd isn't working. I went through all the diagnostics and found that my transfer case works fine and engages, yet my front diff got no power. My front actuator works fine, so next I was going to...
  8. Front CV Shaft Loose

    4x4 Drivetrain
    I purchased my 2002 Trailblazer LTZ in september, and once it began snowing I realized my 4wd isn't working. I went through all the diagnostics and found that my transfer case works fine and engages, yet my front diff got no power. My front actuator works fine, so next I was going to take apart...
  9. 4wd indicator light isn't working

    4x4 Drivetrain
    A while ago the lights on my 4wd went off and would not come on no matter what selection I was in. I'm getting no service 4wd light on the dash, no clunk whenever I switch to 2 or 4wd, nothing. I've already read up a little and pulled and check fuse #8 and also disconnected and...
  10. [SOLVED] 4WD Not Working

    Community Help
    Hey guys, so I am brand new and would like some help and perhaps some handy information in regards to a 2003 Trailblazer LTZ that I own. Today I had it checked out by a mechanic and he told me that the 4wd did not work because the front left 4wd axle was missing. I replaced that, and then had my...
  11. '07 Trailblazer LS 4WD parts questions.

    4x4 Drivetrain
    I have some issues with my Trailblazer that a mechanic I know has diagnosed and is going to fix for me. I am trying to locate the parts to get to him for the repairs, but I have some questions. What is the difference between the 4WD Actuator Housing (Dorman 600-116) and the 4WD Disconnect (ATP...
  12. 4WD Service light on & no 4 wheel drive

    4x4 Drivetrain
    I see that this is a much talked about topic: 4WD Service light on I have a 2003 4.2L v6 trailblazer. When I switch 4 wheel drive switch to anything other than 2Hi the 4WD Service light comes on. I can also tell that the 4 wheel drive isn't engaged from how it feels when I turn the car in...
  13. 4WD will not engage unless in neutral

    4x4 Drivetrain
    Hello all, Just purchased a 2004 GMC Envoy with 106k miles on it very recently and I sort of already have experience with this car since my dad owns an '02 Trailblazer EXT. In his car, which I found out through the manual, you can engage A4WD or 4HI at any speed in any gear. I've known this...
  14. Front diff Problems

    4x4 Drivetrain
    My front wheels in my trailblazer wont engage when I put the truck into aw4d,4hi or 4lo I changed the axel actuator and tried resting the tccm and nothing then last week I put the truck completely in the air and when I put the truck into 4wd there was a ticking or winding noise coming from the...
  15. loss of control..... is it my four wheel drive?

    4x4 Drivetrain
    Hello, I have this problem I think. It is winter now, so I have started to use my four wheel drive. Last year the system seemed tohave an issue that it would engage 4x4 on its own in parking lots and slowing to stop signs. I read that you could pull the fuse and reset the system, so I did, and...
  16. TC & 4x4 issues

    General
    Today while driving down the freeway, the traction control light started blinking (slippery when wet sign) and it felt like one or more of the brakes started pulsating (feeling like from the rear). The TC light immediately went back off. This happened several times during the drive home. Also...
  17. 4WD doesn't work, #48 Under seat keeps blowing

    4x4 Drivetrain
    Hi all, I am a first time poster, but need some help. I have scoured the threads and have not found my exact issue. Since I bought the vehicle the 4WD selector switch has been dark and I have never had an indicator light on the dash. I tried pulling #8 under the hood, but it did not help. I...
  18. ABS/Brake/4wd Lights on

    OEM Issues
    Hello, I have a problem and need help, I have a 2005 GMC Envoy 6cyl , My abs/brake and 4wd light are on, 4wd sometimes goes off but for a few minutes, I went through forum and did pretty much everything that I found that could be wrong, 1) replaced ignition switch 2) Cleaned ground under driver...
  19. HELP! Shaking in 4wd after lift and cv install

    4x4 Drivetrain
    Hi, I'm looking for some help on fixing a problem with my '06 tb 5.3L 4wd (90k miles). I've gone through the site quite extensively but I don't think anyone has had the exact same problem (and posted the solution), so please excuse the long post but I wanted to put up all of the details...
  20. 4wd works when it wants

    4x4 Drivetrain
    i have done a lot of searching and cant figure out what the problem might be. i have an 02 envoy that the a4wd and 4wd has been working on and off. i first noticed when i got stuck in very little snow coming out of the drive way, only one wheel moving. it will go in sometimes after switching...
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