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Chevrolet TrailBlazer Noises and Sounds



  • jackieajackiea Posts: 1
    Yep it's your fan clutch in your engine cooling system. Happened on my a few days ago. Many problems with this yr/make vehicle. We all need to get together & file claims with GM (I already started one) also report problems to National Hwy & Traffic Counsel. Also write your state's attorney gen. do all this so we can get a recall started on sway bars, balljts, tie rods, 4x4 quit working, etc. do I need to go on!
  • abby7abby7 Posts: 1
    Hissing noise recently started on my 2003 Trailblazer, seems to be coming from instrument panel area. Found the title on TSB 050235006-but don't have the details--anyone else having this issue?
  • jaws24jaws24 Posts: 1
    I have a 2003 TB ext - Right after it is started a loud clicking sound can be heard from the rear passenger side !! It clicks for about 3 to 4 minutes and then it stops, everything seems normal after the first 3 - 4 mins. It just started yesterday... Does anyone have any input on this issue !!! Thanks in Advance...
  • I have had the hissing issue from my instrument cluster as well..I will check the fan clutch this week.

    when i turn my wheels hard, i hear a popping sound. I have looked under my truck and nothing stands out that could be causing that noise. It started doing this a couple of weeks ago.

    any idea what it could be??
  • Hi. This is my first attempt at a forum and I really could use some ideas. I have a 2002 TB that has an intermittent growling noise coming from the front. It seems to show up in colder weather (30?? and below). I'm getting this info second hand (this is the wife's vehicle) so bear with me. I thought that the fan clutch might be failing but a few days ago, when she heard the noise again, she was turning everything off (radio, heater fan, etc) she noticed the 4 wheel indicator light blinking - TB was in 2 wheel drive. This seems to manifest while driving. If she parks the TB and comes out later and takes off the problem is gone. I haven't had this experience, but she has told me about it several times last winter and several more this year. Any ideas?
  • brinakbrinak Posts: 2
    I have an 02 Trailblazer. Recently, I experienced a loss of acceleration while driving. I had my cruise set on 65 and suddenly the vehicle just lost acceleration and nothing happened when I mashed the gas pedal. I pulled over and came to a complete stop and then the vehicle would accelerate but about a 1/2 mile up the road the same thing happened again. The vehicle idles smoothly when I pull over. I put it in 3rd gear and kept the RPM between 1500 and 2000 and got it to the shop. They replaced the MAP sensor but the next day the same thing happened again when I got the vehicle up to about 60 MPH. I took it back to the shop (no fault lights were lit up on the dash) and they checked it out and eventually said the MAP sensor they put it was faulty. The vehicle drove fine for about 3 days and then this morning the same thing happened again and the vehicle lost acceleration. Has anyone had this issue or have any suggestions?
  • My 03 did the exact same thing yesterday. Having the fuel filter changed, it is time for that anyway, but after looking around on the threads, that may not fix it. Let me know what you find out!
  • I also have an 04 EXT, and this horrible clicking noise is coming from the rear passenger cargo/third row area behind the paneling. Does anyone have a clue what this could be???
  • jbeal1jbeal1 Posts: 1
    I was hearing a clicking, ping noise under the hood. It was not constant and sounded like a component was turning on, it would click (ping)steady for a while and then stop.It sounded like the fan was hitting something under the hood. What I found was that it was the fan clutch. Fan clutch cost was $290. This fixed my problem.
  • kashwaakashwaa Posts: 1
    hi guys

    i have a 100,000 k.m 04 trailblazer,a bit troublesome but i love her though

    my transmission failed a few months ago and i had to have it rebuilt,it's working pretty fine right now

    the problem is that some times i hear a strange resonant noise ,it comes and goes,and varies in intensity,some times it gets really annoying,it seems to be coming from somewhere in the middle of the car

    it appears only somewhere between 1500 and 2000 rpm,once it gets below 1500 or over 2000 ,it disappears right away

    i think it might be the torque converter or the exhaust mabe
    but i hope somebody could help me figuring out what the problem is
  • jerry94jerry94 Posts: 3
    My wife and I moved from Ca. to Southern Utah last January,and being in snow conditions wanted a 4x4 SUV. As we couldn't afford a new one we bought a used EXT 2002 TB from a used car dealer. The car was used by the original owner to commute from ST George UT. to Los Vages for several years,so it has high millage. The car looked well taken care of and regular maintaince looked to be done on it. As we bought it in the winter, the windows were always rolled up when driving,but we could always hear a slight noise, what I would describe as a slight grinding noise. seemed like it was coming from the dash. I thought perhaps a vent fan.As the weather has got better and in Cedar City UT,you can drive around most of the time without A/C with the windows are down. The other day this noise was really getting to me,but when you come to a stop light the noise goes away. Being a "shade tree mechanic" years ago when you could still do some things your self,I thought drive line. When I got hone I crawled under the TB grabbed the drive shaft, and you could wiggle it back and forth a little, and sure enough the noise was about the same. So it appears the u-joints need replaced. My question is can an old "shade tree mechanic" do this at home with it up on jack stands with basic tools. or do you need a special press to press out the u-joint?
  • jerry94jerry94 Posts: 3
    The same guy the posted the drive line noise. Two other questions. When you start the TB, not every time but perhaps 80% of the time there is a loud knocking noise from the dash. 3-4 loud knocks.I am thinking a vent door opening or closing. Once in awhile it will do it while driving, but most of the time at start up. Also it seems like the engine really winds up before the tranny shifts. Sometimes it has to reach around 3000 rpm before shifting. Is this normal? Thanks for any help.P.S. It has the in line 6
  • gartergarter Posts: 1
    Hi: 2006 TB R/R wheel area a growling type sound for 1 r 2 revoltions and its gone? any ideas as to what it might be? Please don't say bearing
  • The same happened to me. No acceleration, got worse over time. It was a clogged catalytic converter. I had it replaced (at 86,000mi) however, the shop cracked my exhaust manifold getting it off and would not take responsibility for it. I have not fixed that yet but acceleration is back to brand new.
  • How would I begin to file a claim with GM? I am so sick and tired of the problems with my 03 Trailblazer..I only have 66,000 miles on it and I would compare it to a truck that had 300,000 miles on it!!
  • I bought a 2003 Trail Blazer 4x4 but I've noticed a noise with vibration in the steering wheel, this noise, and vibration starts when i accelerate and increases depending on the speed, but his only happens when driving in straight line or right turn. if I turn left even sligthly the sound and vibration ends, I'm driving it in 2H, and even the 4DWH and 4H makes that sound, What can be the problem?
  • mkb3mkb3 Posts: 2
    I have a 2002 TB with the inline 6 and I have the same knocking noise -usually 3 knocks- in the dash in front of the steering column. It happens at start up or within the first 3 minutes of driving.

    I also have a problem with the healights turning off while driving and don't know if these are related.
  • I have a 2008 TB that I bought in July of this year with only 10,714 miles on it. It has developed a loud popping/knocking noise mostly upon start-up but it has happend when in reverse and also in drive. I have had to the dealership 2 times, once they said that it was the drive shaft and the second time they said it could possibly be the AC clutch. They said that they could not duplicate the noise. Does anybody have any ideas of where to go now.
  • n3xjtn3xjt Posts: 2
    In 2WD, when decelerating, from between 40 and 50 MPH,I get a grinding noise in the front end, it almost sounds like it is trying to engage the 4WD. If I put the selector in AWD, the noise goes away. It has been so cold, I haven't had the opportunity to take the wheels off and inspect. I did take a peek at the CV joints, and the boots look intact. Any help would be appreciated.
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