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  1. 2013+ Chevrolet Trailblazer Forum
    Got in my 2003 Envoy XL yesterday and when I started it the ABS light and the Parking brake light both came on (not sure it has anything to do with the other issue, but it may). I put it into drive and pulled out of the driveway. As I went to accelerate the RPMs went up to 4000 but the truck...
  2. Transmission Mods
    So I have a 04 envoy 4x4 4.2L I just had my transmission replaced well come to find out the shop just rebuilt it so said that was in March 2022 come April 2022 I lost 4th then 3rd then 2nd gear only have 1st and reverse left I brought it back to the shop cause I had got a 3 year warranty on it...
  3. Transmission Mods
    I have a 2004 gmc envoy transmission I got from my old envoy to worked amazing. I saw a 2006 envoy on marketplace with a bad transmission. I’ve heard that it won’t work because the new envoys have an extra sensor in them. Is it true? Can I put an 2004 4.2 envoy transmission into a 2006 4.2...
  4. OEM Issues
    I'm trying to repair the 4L60E transmission of my 2004 Trailblazer 4x4 but I have and issue to remove the input drum, I already removed the band but the drum seems to be stuck...any suggestions?
  5. Transmission Mods
    (First post) hello I have a 2005 trailblazer 4x4 that needs a transmission and I have access to a possibly rebuilt 2003 s-10 zr2 4x4 4l60e and was wondering how hard a swap would be, my research shows that it should be basically plug and play after swaping the bellhouseing and transfer case, is...
  6. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Hi everyone! I know this has been covered in a few threads, but I have some symptoms not all. So here's the thing, two months ago after a long trip I felt my TB have a hard 1-2 upshift. It has been the bane of my existence since then. In that time to try and figure everything out, I have...
  7. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    my trailblazer wouldn't go into 3rd 6 months ago and we got an offer to switch out the transmission for a rebuilt one for $300 at the same time we messed with some of the electrical stuff because my right headlamp was off and we fixed both issues. but about 2 months ago it started to act up...
  8. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Hi, For the past few weeks i noticed the truck (trailblazer 2005) when going up a hill it suddenly gives high sound like i pressed the gas pedal to accelerate, when i feel that i remove my leg from gas pedal then press again and trucks drives normally. Today i was going uphill and i wanted to...
  9. OEM Issues
    Hello. I’ve been getting a p0128 for awhile and just ignored it and figured I’d get to it when I get to it. Not sure if it’s related to my reason for posting. My question is about the 2 new codes and breakdown I’ve experienced tonight. P0741 and P0894 are the codes and I’ll explain what...
  10. OEM Issues
    Hey guys, I have a 2004 Envoy I6. Today after about ten minutes of steep mountain curves I noticed a slight burning smell. The car wasn’t overheating and it didn’t smell like hot coolant so I assume the transmission was cooking. Fluid was flushed about 4 months ago so it’s pretty new. How normal...
  11. The "How-To" and DIY Section
    Hi folks, new to this forum and the answer may exist but have not had a chance to research so thought I would put my issue out there. Traveling on the highway and car just went into neutral. Had to coast to the side. Definitely not the shift cable as the car goes into and out of Park. Also...
  12. 4x4 Drivetrain
    About 6 months ago, I changed out my water pump. Yesterday, while my wife was driving, the nut connecting the fan clutch to the water pump backed off, threw the fan into the shroud, breaking it. That was an easy fix: new shroud, new fan clutch, new water pump. Here's the problem, though! The...
  13. 02-09 General Tech Q&A
    05 trailblazer i6 300k miles Hey all ive got a good one for yall. Im getting a screaming sound when on the accelerator only when under load. The trans shifts perfect every time and the tourque converter locks up as it should. It only makes noise when in gear and u can feather the loudness with...
  14. OEM Issues
    Hello! Recently got an 05 TB LT... enjoyed it for all of 2 months before having this rather concerning and perhaps catastrophic issue. Car had been vibrating slightly going uphill (I Live in the western north carolina mountains), but no slipping etc - this problem came about perhaps 2 weeks ago...
  15. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Hello, I have a 06 chevy trailblazer LS 2wd V6, so when you are driving it when it goes to shift from 2nd to 3rd it acts like it wants to go into 3rd but sounds/acts like its in neutral instead, going to attach what codes it is throwing, I have already replaced the 1-2 shift solenoid, 2-3 shift...
  16. General
    Hello everyone. Im gonna try to be concise here, but I have a tendency to ramble so bear with me. I am rebuilding my truck. 2002 TB LTZ. I wanted to upgrade to an 07+ tahoe, but I have no interest in paying over 10k for a car from 2010 right now. So my trailblazer with 220k on it is going to...
  17. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Im getting a transmission flush next week but I'm not getting the transmission filter changed because the labor will cost a lot more. Is it ok to leave the filter and just flush the fluid?
  18. 02-09 General Tech Q&A
    Hello everyone , replacing my shift solenoids in my 2006 envoy. Want to make sure they are seated correctly before reassembly. One has a spring behind it , when I compress it flush with the block and lock the clip in. It doesn't stay flush. Pops out a little bit. The clips only seat one...
  19. General
    So my envoy 4wd will not shift into 3rd or D. It revs to 7 grand but doesnt shift. I have no codes on the dash. Small leak in cooler line where it attaches to the radiator. No metal in fluid and fluid is not low. What is this. Im a mom who just needs to fix her kid transporter. I dont have...
  20. OEM Issues
    My truck is shuddering in overdrive when driven at constant speeds and constant loads. Pressing the gas to take it out of lockup results in a harsh release of the clutch. No codes found. I have a scanner that reads transmission, abs, airbag, etc. At 55mph, constant load, level ground (for...
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