Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner


  1. 5.3L Whinny Engine

    OEM Issues
    I have had this issue since purchase in 06. My engine sounds like I ran over my whinny ex-wife. I solved the ex-wife about this engine noise. It's always whining under the hood. It's not the power steering. It gets louder as I accelerate. Any suggestions? :suicide:
  2. Front End Noises, all the same?

    4x4 Drivetrain
    i have a 2006 Envoy with ~120K on it. I have some noises/vibrations comming from the front end and can't figure it out. Any Suggestions?? 1. Going down bumpy roads there is a slight "loose" felling/ knocking in the front left. Almost feels like a tie-rod end, but it is tight. 2. When going...
  3. 02 to 06 Alternator Difference?

    Engine Tunes/Mods
    After getting the 02 engine swapped with an 06, Ive been noticing on and off weriod screech noises on the engine. The Serp belt was already replaced just to let you know. My friend thinks its has something to do with the alternator since the serp belt is a little off aligned with the idle...
  4. Metal on Metal noise from under my truck

    OEM Issues
    My truck has just over 100,000 miles on it. A couple of weeks ago it started making a metal on metal noise. It does this when I am driving from 36 mph to 38 mph and again at 56 mph to 58 mph. I am thinking tranmission? :confused:
  5. Rubbing noise Glove box

    Greetings All, I have been lurking for about a year now and finally needed to post. Did a search but came up empty. I am hearing a noise from behind the glove box. I removed the glove box and it seems to be coming from the black AC thingy behind the glove box. Hard to describe here, but a...
  6. Advise on diagnosing front inner bearing replacement.

    4x4 Drivetrain
    I would like to confirm that the inner bearing on the driver side needs to be replaced. When I Grab the end of the CV going into it, there is up and down play. Don't know how much if any is normal or if there should be any play at all. The hub on this side was recently replaced, reducing the...
  7. Engine making weird intermittent sounds

    OEM Issues
    Hello everyone. I've been lurking around here for some time, but have never run across a problem I've had to post on until now. I have a 2005 Envoy SLT 4x4 with a 4.2L engine. Lately my truck has been acting weird. There is a loud, almost like someone installed a super large fan, sound...
  8. Front end "thunk"

    Greetings! I need your help with what I fear is an escalating problem. Since arriving in Germany four months ago, and subjecting my TB to many twists and turns on the roads here, I've noticed a pronounced "thunk" in the front end when entering curves and hitting bumps. After reviewing way too...
  9. Wrong fluid in TC

    4x4 Drivetrain
    Hi May wrong fluid in TC be the cause of whining sound??. I have not been able to check the fluid since i bought my TB because of the cold weather and not having access to a garage. The TC is supposed to be changed about 12,000km before i got it and im not sure if the right fluid is in there...
  10. G80 Pinion seal leaking and whirring.

    4x4 Drivetrain
    02 Envoy with 114k on the clock is pushing fluid out the pinion seal. It also has a werring or wine sound after it gets warmed up kind of difficult to locate exactly where it comes from. I changed the fluid with standard issue GM lube and its probably due for a change. I need to check the...
  11. Bad engine noise

    OEM Issues
    I recently replaced my engine with a remanufactured I6. Just recently it started making really loud knocking sounds. The loudness and rythm change with RPM's. When driving on the highway, when I accelerate slighty I can barely hear it, but when I let up on the gas it get extremely loud and then...
  12. Terrible Ground Loop! This one will stump the PRO's!

    Audio and Electronics
    Ok, so just so have a little inside knowledge here is the setup: 2005 Chevy Trailblazer Kenwood DDX812 Headunit JL Audio 1000/1 Alpine Type X Sub 12" Alpine MRP-F600 (4-channel amp) Alpine Type R Components Up front Alpine Type R Coaxials in the back doors Kinetics HC-600 battery Ok...
  13. [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...
  14. Pinging Noise when Cold

    Engine Tunes/Mods
    2006 6 cyl trailblazer LT off lease with 40k miles. Chicago weather and salt conditions. now at 46k miles. Problem: On a cold start, pinging noise can be heard best between houses in driveway at idle. Seems to come from front seats forward. Goes away or cannot hear it as car hits normal...
  15. Constant whining noise

    Hello everyone, I have a 2002 TB LT 4wd. Several weeks ago a squeaking noise began. It begins after I start the car, and changes in loudness and sound with pressing the brake pedal, pressing the accelerator, letting go of the brake pedal, and letting go of the accelerator. It also continues...
  16. Chassis Knocking Noise

    Question: When I drive and hit little bumbs in the road it sounds like my chassis is about to fall apart. Its getting very annoying and I need some advice. I was going to lube the chassis and try to see if some bushings are bad but i dont have the slightest clue as to where to start looking.
  17. something squeeking under car

    OEM Issues
    I have an '06 envoy with 53k miles. When i drive i hear squeeking and rattling comming form under the car and can't tell if its from the suspension or something else loose. It seems to happen when im going around 35-40 and when im turning, also it happens whether I'm braking or not braking. I...
  18. Banging noise in rear when hitting bumps

    4x4 Drivetrain
    Hi, I have a 2002 Trailblazer 4WD with a little over 112,000 miles on it. When I hit a bump or pothole there is a loud banging noise coming from the rear, really loud. When on a smooth surface there is no noise banging from the rear or other njoise for that matter. I had the truck on stands and...