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  1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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?
  6. 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...
  7. 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...
  8. 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...
  9. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Hello everyone! I am back! This time, I have a transmission issue, the Envoy in question has 180,xxx miles, the engine has been taken care of thoroughly by me since I got the vehicle, I mean EVERYTHING. A tune-up, gaskets, synthetic oil changes, water pump, radiator fan, serpentine belt...
  10. OEM Issues
    This is a new to me 04 trailblazer i6. Mileage is 134000 and the transmission is supposedly at 60k. Purchased it a couple of months ago and it has more or less ran fine with the exception of some of the common HVAC gremlins and it even performed great towing my 2200# popup trailer a couple hours...
  11. General
    Hello! I'm sorry if this is in the wrong place. I have a 2002 Trailblazer and I've recently started experiencing high revs, 3-4000rpm, intermittently. I was told it might be the tranny filter so I changed that along with all new gaskets and fluids. it now seems to be happening only at low speeds...
  12. General
    Hello! I'm sorry if this is in the wrong place. I have a 2002 Trailblazer and I've recently started experiencing high revs, 3-4000, intermittently. I was told it might be the tranny filter so I changed that along with all new gaskets and fluids. it now seems to be happening only at low speeds...
  13. OEM Issues
    HELP so I started out with my check engine light coming on got code p0121. Then started having trouble starting truck every other time the battery gage would go up and down a little and the icon for security was partially lite. Then truck wouldn’t start just click click click. So disconnected...
  14. OEM Issues
    I've noticed a very damaging like-sound come from my truck recently, it sounds terrible! I have the 4l60e, it sounds as if the transmission is just grinding on the gear to shift, it'll make a terrible grinding noise when trying to shift from 1st to 2nd and then 2nd to 3rd. I dont know what it...
  15. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    I have a 2004 GMC envoy XLT 4 x 4. It started with the shift linkage started to fall off so I could crawl into there and hook it back up and was good to go. Then they started when I was in reverse it wouldn't go so I'd give it more gas and it act like it was binding up as if it was in 4-wheel...
  16. OEM Issues
    Evening all, I am in hopes that someone can help me, Over the past month I have completely replaced the transmission in my fiance's 04 Trailblazer ext. Her old one was not moving in any gear and we were able to get a used one out of a donor vehicle pretty cheap ($150). When I finally got it all...
  17. OEM Issues
    Pulling my trans on my 03 trailblazer 4x4. I can’t get the cross member out, on the passenger side, by the fuel tank there is a black box that keeps me from removing one of the through bolts on the crossmember. The bolt is too long to pull out with that black box in the way. I can’t figure out...
  18. Transmission Mods
    I will give as much information as possible. I parked my car after driving to wallyworld I had absolutely no problems. I get up in the morning drive for coffee shift to second that’s it. I had no slippage the day before. It’s like limp mode without any idiot lights. I’m in NC just came back from...
  19. General
    This is the day i've regretted for a long time. It seems that my transmission is toast, and for a car with just over 135k, I am pretty disappointed. But, this may be an opportunity! I drive a 2003 TrailBlazer LTZ, 4.2l, 4x4. I've done some looking, and it appears that the engines in the...
  20. OEM Issues
    Hi all! Lately I've been having a fairly new set of issues. And I am not sure if they're connected but I'm assuming they are. I've recently been hearing a knock that raises in frequency and slightly in volume along with RPM's. Fairly certain I've isolated the noise at the bell housing. I checked...
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