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Chevy TrailBlazer Loss of power



  • burdawgburdawg Posts: 1,524
    What do you mean "they stapled a wire on the transmission"?
  • br2ubr2u Posts: 2
    I don't know what that means. That is all they told me and was on the repair statement they gave me. I didn't take the time to look under it to see what they did, I'd had enough of the run around.
  • jims1024jims1024 Posts: 1
  • tahilltahill Posts: 2
    Chevy 2005 TB
    My truck first starting having hesitation issues when going up hill @ 35,000 miles. Of course I took in to the dealer they kept it for 3 days and could not find anything wrong or duplicate the issue. They told me it was probably a bad tank of gas. Things were fine...nothing happened until last week. Due to "other" issues I waited to have my 30,000 mile check up done last week. I am currently at 45,000 miles. I went to get in the truck to take it in and the check engine light came on. Not a big deal as I was already on my way to the shop, they did a diagnostic test and it was coming up as a o2 senor issue. The mechanic working on my truck told me what the code was but said that he did not think this was the issue. He did the 30,000 mile check up; the check engine light went off. I picked up the truck and things were fine until the past Tuesday night. I was driving to work...sitting idle at the exit ramp my truck shakes a bit then dies. I cut the engine off, restarted it no more issues on the way to work. That afternoon...same thing happened. Waiting my turn at a stop sign, car dies. Turn it all the way off, restarts with no issues. I drove it home. Wednesday night while turning onto our subdivision street coasting at a low speed the truck looses power again. Called up my mechanic he told me to bring it in right away...just got a call from him stating that GM has a PCM update that will re-calibrate several things from the transmission to the electronic throttle control. I will repost in a few days to let you know if this does correct the hesitation and stalling issues that I have been experiencing.
  • greddengredden Posts: 30
    Please let us know!!
    I have a 05 TB with 60k miles. The problem that I am having is that when the engine is cold I will have power loss and as soon as I take my foot off the gas, the car will die. The engine starts right back up. The check engine light nor does any other service light come on. This problem is very sporadic. I did add some Lucas fuel treatment and we did not experience the problem, but I think it was just luck. This problem happened to my wife this morning. Any ideas???
  • vbellvbell Posts: 11
    thanks alot!!! It hasnt done it for a good 6 months or more now!! Onstar has been reactivated and I havent had a problem since!!!! :confuse:
  • greddengredden Posts: 30
    Hey vbell

    What exactly did they do to fix your problem? I'm taking mine in tomorrow.

  • greddengredden Posts: 30
    It looks like I have solved my problems! I want to thank you all for the TSB concerning the loss of power and stalling. This past Saturday I went to the dealer and had the software update done. While at the dealer, the service person recommended a fuel system cleaning for $130. I declined because the service techs get paid a commission on what they sell. I added a can of Sea Foam to my tank. This is the same thing that a lot of mechanics use to clean the fuel system of carbon. I also replaced the O2 sensor on Sunday.

    My TB is running like a dream! I'm also getting 18.4 MPG for everyday driving.
  • mookie14mookie14 Posts: 252
    a 03 tblazer and what you guys are going through is this there is fan clutch and its connected to the engine. Whats happening is its not the engine its the tranny how do i know the 03 i had i replaced well gm did 8 to 9 fan clutches and it still did not work. Turns out the tranny started to slip because REDUCED ENGINE POWER now the light may or may or may not come on because the fan won't let the engine over heat and its built into engine.
    As honda's has a electric fan and it cuts on just when the engine is getting hot and it does not lose power. So as you guys drive you all will see you all are going to need trannies im not lying. The techs know but they are told NOT say anything about a defect and they are not going to let them waste all that time on a defect that gm did not fix. So trade out now and take a hit if you can and buy [non-permissible content removed] autos i did i got a honda and 27000 miles later no problems period.
  • responding to my post from a few months ago...looks like I spent over 700.00 dollars to finally be told that the 02 sensor was bad! My truck has been running like a dream since it has been changed out. Luckily the shop did not charge me for the 02 sensor replacement, since I had to pay for everything else done that was not correcting the porblem. If you are experiencing the same issues have them change it shop told me the sensor did not look bad thus the reason why they did not replce it the first time that i took it in...
  • I recently pruchased 2003 trail blazer. Driving around town its fine. Driving down the highway, after about 40 miles or so, it loses power, but doesn't die. I pull over on the shoulder, shut it off, restart it & it goes on. Can someone HELP please. Has had it in chevrolet shop twice, w/ no explanations.
  • I have a 2000 BLazer/Trailblazer package w/173k on it. 1.5 weeks ago I replaced the intake manifold which gave me a little more zip and slightly smoother ride. So I was en route out of town and all of a sudden the SUV loses power. I was going 70mph and all of a sudden nada! I could not get it to restart. The electrical system seemed to be working fine. Battery good. All liquids fine. All other systems seemed to be fine.
    I was towed to my mechanic (does not use computers just listens and looks) who said I need a new motor. I then spoke with another friend who is a mechanic who told me to take it back to the mechanic who did the intake, which I did. They are much more advanced than the first mechanic and have machinery that the car is being tested. So far no information.
    Has this happened to anyone? What transpired? What else do I need to know? Thanks in advance!
  • tori7tori7 Posts: 1
    Did you ever get your loss of power resolved? I had the problem in 2008 $3000 later and now again. I am so frustrated and dont know what to do...
  • The buttons to the radio on my '04 SE 6cyl. don't work. The knobs do work however. I pulled the fuse (No. 41) and re-inserted it again after 5 min. It changed from AM to CD but I could not change it back and the buttons continued not to work. Does anyone have any suggestions on how to fix this problem?
  • Im desperate! I have read so many post on here about the same things happening, but it doesnt seem like anyone ever gets it resolved. My 04 TB was running fine, then it started to lose power with the ac on, then it got to where we couldnt run the ac at all...within a week it was losing power on hills and then just went from 60 - 10 in like 60 seconds!
    This is our only vehicle and its been in the shop now for a week with I cant even tell you how much money sunk into it. So far they have changed the cam sensor, the crank sensor, oil change, checked the throttle sensor, and I really dont even know what else.
    I have seen so many different things on here that if I had them fix all of them I would be better off just parting out the car! Not really but Im sooo frustrated!

    Please please someone help! What can I do? Its been coded and everything that might have come up on the codes has been fixed. Someone suggested the O2 sensor but I have like 3 or 4, and none of them look bad.

    I would appreciate any guidance!!


    In Mo. Without A Car!
  • wes123wes123 Posts: 3
    I have a 2002 Trailblazer that, while driving down the road, would just quit. Engine stopped, no power steering or brakes. Dealer said there was no "error codes" of any type. When I put the car in PARK and turned off the ignition, and tried to restart, it WOULD, as if nothing had happened. My dealer kept my car, and, was able to experience the same LOSS OF POWER, and, finally got a BAD O2 SENSOR reading. It was causing the car to FLOOD ITSELF, causing the engine stalling out. Hope this helps all you POWER LOSS folks. Cost me $400 to get it fixed. Seems like a lot of faulty O2 SENSORS in GM products.
  • greddengredden Posts: 30
    That is crazy that it cost you $400 for the O2 sensors. Anyways, I has having this same issue too. There is a SB from GM about this issue. The fix is a software update for the computer. The update cost about $85. Just be aware of this if the issues start occuring again.
  • wes123wes123 Posts: 3
    Well, they replaced the O2 sensor, and, I'm pretty sure this solved the problem. Remember, this did not show up on a computer code. I first paid for a fuel filter and throttle body cleaning, before they found the O2 sensor to be the cost to me = $600. :sick:
  • Hey everyone, I have a 2002 TB LT 4WD. This past Saturday my wife and I drove about 30 minutes to visit a museum. After we left to go have lunch, we drove about 1/4 mile to an intersection. When the traffic light turned green and we accelerated to make our left turn, our TB struggled for power, it rattled, like we had a flat tire. We pulled over, I checked the tires but they were all good.
    We decided to try and make it home, but the TB was barely given us any power to merge onto the freeway. We decided to pull into a burger joint and have it towed home and not risk any damage or have it break down on the highway somewhere.
    From what I noticed, all the guages seemed normal. I did not smell anything unusual as for as gas or oil, plus I did not notice any leaks after we parked it.
    When I start it up, it sounds rough, like it is gasping for air or fuel. I can hear a "putt putt" from the muffler and can feel the exhaust coming out in spurts and not a smooth flow. The vehicle was fine on the drive over, not issues, we had the a/c running as well with no issues. Any ideas what it could be? I'm thinking of changing the O2 sensors to see it that helps. We have already had the transmission replaced once about two years ago. Nothing but problems with this vehicle, don't even get me started on the window but the drivers side works now, I have replaced it twice already.
    Also, does anyone have any issues with the RPM guage not working, it is useless, sometimes it works, but most times it is just all over the place when the engine is(was) running fine. When I rev up, the needle moves up, but does not come back down, the more I rev, the higher it goes until it's pegged care all......Eli
  • I want to try to help all those with the loss of power problem...We just had this issue and tried everything my mechanic could think of, including: new O2 sensors, cam sensor, crank sensor, tune up, oil change, throttle bottle cleaned, new fuel sensors inside the car and under the hood...after alot of money it turned out to be the caytalic converter!! Once this was replaced my TB runs like a dream! I hope this helps anyone looking for the fix to this issue, :)
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