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noise

  1. Rattling noise (not piston slap)

    02-09 General Tech Q&A
    My trailblazer makes a loud rattling noise that sounds like a dancing gear or a dancing belt hitting something/rubbing on something. It's coming from the very front of the valve cover, the truck runs fine and doesn't have any issues, it just makes a concerning noise. Note: I'm running it with...
  2. Metallic Rattling Noise At Rear Of Vehicle

    OEM Issues
    So let me describe whats happening. Ive got a 2005 Trailblazer LS with the 4.2ltr engine.It rides & sounds normal on smooth roads regardless of speed.However,when you're driving through potholes or hitting any type of bump period,you can hear a loud rattling noise near the rear.If you were to...
  3. Annoying clicking from under dash.

    General
    Truck started making an annoying sound a week or two ago and I thought it was the blower. After finally deciding to check it out, I discovered it's actually not the blower making the noise. I'm 85% sure it's some component jammed way up in the dash that I have no idea what is. It looks like...
  4. Rear End Noise - Help!

    4x4 Drivetrain
    Hey everybody. I'm generally a lurker on the forums since I usually find what I'm looking for has been answered/discussed 10 times over before I get to the party, but this time its not the case. Here is the skinny: -06 TB LS - i6 4x4 with GU6 3.42 Non-locking Rear End 189,000 miles...
  5. Rear End Noise - Help!

    OEM Issues
    Hey everybody. I'm generally a lurker on the forums since I usually find what I'm looking for has been answered/discussed 10 times over before I get to the party, but this time its not the case. Here is the skinny: -06 TB LS - i6 4x4 with GU6 3.42 Non-locking Rear End 189,000 miles...
  6. Squeaking noise coming from fuel tank?

    General
    I have a 2007 Envoy 4.2L and when I drive over rough roads the car makes a very annoying squeaking noise. It definitely is coming from the back of the truck. The other day while pumping gas I realized if I shake the nozzle from the fuel pump while its in the filler neck it makes the same...
  7. Noises?

    General
    There are noises coming from our 2007 Trailblazer that seem to be coming from the front and the wheel, maybe the right front one. The first is a squeaky noise that sounds like it's coming from the front end when we run over bumps in the road. The other is a "woop-woop-woop" sound that seems to...
  8. Knocking noise after purge selinod replaced

    General
    I replaced purge vent selinod after research and having it hooked up (07 chevy trailblazer) and now it starts like it should but there is a knocking noise while running. Is this because the compression changed? I am not very mechanical and before I take it and drop a ton of money for someone to...
  9. Front end noise after major coolant leak and replacing water pump

    General
    Hello Folks, I had to replace the water pump on my 02 Trailblazer. I got everything back together, and I had the classic dirty throttle body symptoms after having the battery disconnected - it would almost stall, rpms around 300 after turning on A/C or defrost. So I removed and cleaned the...
  10. Gurgling sound from air intake

    OEM Issues
    Have a 2005 TB LS with 4.2 with 180k. Just recently noticed a gurgling noise coming from the intake at idle. I pulled the air cleaner cover off, and sound got louder. Pulled radiator cap off, radiator and overflow are full, and coolant has good color. Left the cap off and let it run for 5...
  11. Ticking under acceleration

    General
    New 05 Trailblazer LS w/ 4.2 I6 owner. The check engine light is on, ran code reader, came out as something to do with thermostat. Not too worried about that since it doesn't appear to be running hot, looked up OEM thermostat temp as 190, gauge is reading about 200. What I am wondering about...
  12. Loud Noise + Shudder

    General
    Hey All, First post ever! I posted in this section because I have no idea what it's concerning/where it's located and what's wrong. Several weeks ago, I noticed this shudder/vibration under the steering wheel whenever I first started the car or right after I shut it off (the engine normally...
  13. [SOLVED] JET Engine Noise

    General
    My 2007 SS Trailblazer started making a jet engine noise that gets louder as you accelerate, I had the front brakes changed so it's not the brakes :confused:
  14. Rearend Whine Above 50mph, New to TB, Please Help

    4x4 Drivetrain
    First post, sorry if it is a repeat. I have been searching all morning, but haven't found anything fitting my scenario. Mods, please feel free to move if this is the wrong place for this. I just picked up a 2002 TB LTZ I6 2 days ago with 109K miles on it. I took it for a 30 mile county road...
  15. Vibration/clunking when coming to a complete stop?

    4x4 Drivetrain
    I have a 2005 Envoy SLT with 100k miles. When I come to a complete stop, I hear a clunking noise right after the vehicle completely stops. The best way I can describe it: when you slow down, the weight shifts to the front of the vehicle and it dips down. Once you come to a complete stop...
  16. Front end vibration/rattle at speed.

    General
    I have a 04 TB EXT 4x4 that has developed a 'rattle' above 45 MPH. It is more of a vibration in the floorboard than a noise and is only noticeable on a smooth road. The best description I can give is it feels like someone is hitting the floorboard with a rubber mallet intermittently. The...
  17. USMC TB Owner - rough, then smooth engine

    OEM Issues
    I have an 08 TrailBlazer I-6 with 74K miles. It's had a slight clackity-clack noise when cold started, but never a serious issue until today when I cold cranked it and my entire engine compartment sounds like a busted muffler. More odd, I have zero faults, and the holey-exhaust noise disappears...
  18. Driveline ticking/clicking noise

    4x4 Drivetrain
    I've got an unidentified noise coming from the driveline somewhere. At first I thought it was a loose brake pad, or a brake sheild rubbing just a little bit, because it sounds like a metallic clicking/ticking/rubbing sound, from underneath of the vehicle. It seems to be from the front of the...
  19. [SOLVED] Rattling Under Acceleration (2.5k-3.25k rpms)

    OEM Issues
    Hi this is my first post... I own a 2003 trailblazer and ever since i bought it 2 years ago it has had a problem with some rattling. The rattling begins under slow to medium acceleration around 2500 rpms and gets worse until about 3250 rpms or until the gear changes. It doesn't happen under...
  20. Bose rear speaker buzz, hum, crackle, whine, noise

    Audio and Electronics
    Ok, I had the rear speaker buzz. I have a 2005 TB with the Bose system. I thought - factory speakers are crap and crapping out so I put new speakers in. Not the problem. Some said the rear entertainment controls affected theirs. I unplugged it and jumpered the wires in the plug so the speakers...
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