Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner


  1. AWD and 4hi and 4low Light blink than service light appears

    4x4 Drivetrain
    Im new to owning a 4wd vehicle. So I don't know exactly everything about the whole system. But, like the title said. Ill put it in neutral and try to switch it into 4wd(it goes for all posistions) and I hear it engage, but the 2wd still stays on and 4wd is still flashing but the service light...
  2. 4x4 selector switch have no lights, no front tire engagement

    4x4 Drivetrain
    Great site! Anyway I have read through all the forums and can't quite get the answer I'm looking for. I have a 2006 trailblazer with the 4x4 service light on and no lights on the selector switch (they light up on start up so they work) and of course no 4 wheel drive. I turn the selector switch...
  3. 4x4 issues.... ideas?

    4x4 Drivetrain
    Hi all, I have a 2003 trailblazer ext with 4.10 gearing. I got this with 84k and now have 137k. They told me all maintenance on this thing was done and I haven't changed fluid in tc yet. I was gonna as soon as warmer weather comes.... I have been using my 4x4 a lot with winter hitting full...
  4. A4W does not work!

    4x4 Drivetrain
    When switching from 2W drive to A4W the light does not change or blink, the 4W drive works fine and engages perfectly, even the 2W drive works. Any ideas as to what the problem is, or could be?
  5. 2007 Chevy Trailblazer ls with 4x4 issue

    4x4 Drivetrain
    Hi, I'm new to this forum but have used it for many fixes for my TB so maybe you guys can help with this.(sorry if I am doing this wrong) I have a 2007 Trailblazer LS with 4.2L and 133,500 miles, When the truck is in 4x4 and driving down the road it will occasionally "bang", you can feel it...
  6. 2005 Trailblazer 4x4

    2005 Trailblazer 4x4

    2 1/2 inch lift and 16 inch Mickey Thompson Sidebiters A lot more I want to do. This Trailblazer was totaled in a tornado but we fixed her back and named her Dorothy. This chik loves her 4x4!
  7. 05 Trailblazer- Rough Running engine after replacing #6 injector

    OEM Issues
    I have a 05 Trailblazer, I6, 4X4, EXTLS and it has some rough running issues. I originally had a PO306 code come up so I replaced the following in this order: 1. spark plugs- still running rough 2. coil pack on #5 & #6- still running rough 3. replaced #6 injector, intake gasket, valve cover...
  8. Problem with trans or transfer case ?????

    4x4 Drivetrain
    Ok hears the speal! I was sitting in a parking lot waiting for my daughter, once she arrived we left. while pulling out the envoy reved and clunked (almost like reving in neutral and dropping into drive.) We continued down the road and there was a weird noise under the vehicle. (crap the...
  9. 2003 Envoy XL SLT 4x4

    Good Day All !!! I found the site trying to diagnose an Ambient Air Temp Sensor problem with my 2003 Envoy XL SLT. This is a great site, so I had to join. I have other issues with my Envoy that I will be researching. They include: - Speedometer not working (I installed...
  10. ITS POSSESSED! Changes from 2wd to 4wd to a4wd on its own.

    4x4 Drivetrain
    Ok, just bought a 2003 Envoy two days ago. I noticed when at a light the lights on the selector went from 2wd to 4wd (without touching the switch). And i did hear and feel the transfer case change. i moved the switch to 4wd and back to 2wd and it went back to 2wd. Hope it does not go to 4lo...
  11. thanks

    I´m New here Thanks to all community!
  12. 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...
  13. Solid axle swap?

    4x4 Drivetrain
    Just wondering if any one thought about a solid axle swap for the front?
  14. Won't switch from A4WD

    4x4 Drivetrain
    Hey guys. Thanks in advance for helping me. A few nights ago I was trying to get out of an icy parking lot, was slipping so I switched into 4Hi as it was an ice skating rink. Everything switched over just fine and I went on my way. Back on clean roads I switched back to 2wd and the light...
  15. 04 TB LT Airbag Light and ABS Light on at same time.

    OEM Issues
    I have an 04 TB LT, and for awhile now the Airbag and ABS light have been coming on. They always go on and go off together. Sometimes it does it and other times it doesn't. They've both been on now for a few days. I was driving home in 4x4 Hi because of the bad snowy road conditions and...
  16. leaking gearbox

    4x4 Drivetrain
    I apologize in advance for not being educated on autos, and the proper lingo. But here goes. Left front, leaking, mechanic used small camera to isolate leak and said it was the left side of the "gearbox" in which the "axle" went to. He took off a spring to remove the axle from the left side and...
  17. Strange Growling noise coming from front end.

    OEM Issues
    Hello everyone. I'm new to the site, and I did some searching around for any threads that have a similar description but I haven't found any so far. I have an 05 TB LT EXT with 4 wheel drive. The noise that is coming from the front end almost sounds like a bad wheel bearing, but the weird thing...
  18. [SOLVED] 05 TB-LS-4x4: 4X4 Switch and Maintenence light.

    I have a 05 Trailblazer LT with 4x4. I have used the 4x4 successfully in the past. A few days ago I tried to switch it into 4low to get over a tall curb with a trailer, and the instant I switched it the indicator lights went from being active to not light up at all in any selection. At the same...
  19. TCCM/Selector Switch Issue......

    4x4 Drivetrain
    Hello everyone, I just bought an '04 TB LS 4x4, when I first drove it everything worked fine. then the next day I had the blinking selector lights then it goes dark, when I switch to another mode the light would blink above it and then go off. This went on for about a day. Then I read about...
  20. [SOLVED] Where my transfer case peeps at?

    4x4 Drivetrain
    So it seems that every month so far this year has plagued me with some kind of financial "incident". Yesterday I had taken some stuff over to a good friend of mine's house. I had to 4wd backwards into his yard to get over a curb. Later on I left his house and noticed a noise coming from the...