2004 Trailblazer grinding/growling no...

2004 Trailblazer grinding/growling noise when accelerating

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Mark

Hendersonville, TN

#1 Feb 2, 2012
This just started about 1-2 weeks ago. My Trailblazer is making a growling/grinding when I accelerate from a standstill. The noise is coming from under the vehicle in the front. It's definitely gotten louder the past couple of days and only does it when I first start to accelerate; after the car shifts into 2nd or as I gain speed the noise stops. It doesn't seem to be driving funny, no loss of power, just the grinding/growling noise and a sound like something is shaking/vibrating. Also, my service engine light just came on. Anybody have any ideas?
DanO

East Moriches, NY

#2 Feb 7, 2012
I have the exact same problem minus the service engine light. I had taken mine to the shop to have it checked out but they didnt find anything wrong. Tomorrow i'll be under the truck looking for loose parts/ bolts.
SteveO

London, Canada

#3 Mar 9, 2012
My trailblazer is having the same problem, but no engine light. I'm thinking it might be a lose or damaged manifold.
Johnny

Fargo, ND

#4 Mar 28, 2012
Anyone figure this out yet? Same issue on my 04' trailblazer. I can't recreate the sound when in park or neutral. Almost makes me wonder if it's possibly a u-joint problem though that seems weird. Also, mine started as soon as I replaced the water pump ( cheap Dura...whatever they sell at autozone), I'm thinking of ordering an AC Delco water pump just to rule that out. Weird
Lucus91

Fargo, ND

#5 Aug 1, 2012
DanO wrote:
I have the exact same problem minus the service engine light. I had taken mine to the shop to have it checked out but they didnt find anything wrong. Tomorrow i'll be under the truck looking for loose parts/ bolts.
Has anyone figured this out, I have the same issue. Grinding vibration from dead stop or kick down and nothing if I run threw the gears gently. Please Help!
DanO

East Moriches, NY

#6 Aug 1, 2012
Mine just magically stopped, no idea what it was. Either it stopped or I am used to hearing it every time i drive.
ChevyOwner

Odessa, FL

#7 Aug 27, 2012
There should really be a recall by GM. This is BS that all trailblazers have this problem AND the #4 coil pack always going bad due to rain water getting in there. Its a piss poor design!(Dont let me get started on the cup holders).
mrs johns

Pittsburgh, PA

#8 Nov 17, 2012
check the wheel bearing and hubs
yo there

Edinburg, TX

#9 Nov 17, 2012
yo yo
Scottie30

Douglas, WY

#10 Nov 27, 2012
My ford explorer does the same thing. Over the past 6 months I have replaced the engine! However this noise wasn't occurring prior to the replacement. I have however recreated it a few times, by someone putting it in gear and pressing the gas while I was listening under the hood. It seams the noise is coming from the a/c clutch! It hasn't made the noise since the summer when I used the a/c! However just recently it has started to make the noise almost every startup! If anyone has any clue as to what this is I would be much appreciated!
Les

Minneapolis, MN

#11 Jun 19, 2013
Same problem here 02 Envoy. When cold mainly it makes vibration type growl when accelerating from 1st to 2nd mainly and then goes away once vehicle warm. Has anyone figures this out?
Airman

Dover, DE

#12 Jun 24, 2013
The noise is caused by a couple things. First and most common, the wheel hub. Second would be the wheel bearings. Or something could just be rubbing. Take off the tire and just look around.
Ron

United States

#13 Sep 2, 2013
Yes we to have purchased 04 tb ext. And it surgeries up and down as I drive and stalled when
I come to a stop. I put just the key in the ignition and drove i, it didn't stall this time. So weight on the
ignition switch could be the culprit for us on the stalling.
Dan

Mastic Beach, NY

#14 Sep 2, 2013
Ron wrote:
Yes we to have purchased 04 tb ext. And it surgeries up and down as I drive and stalled when
I come to a stop. I put just the key in the ignition and drove i, it didn't stall this time. So weight on the
ignition switch could be the culprit for us on the stalling.
I had that problem and it was the throttle body, clean that and you'll be good to go. There are videos on YouTube showing how to do it.
Ron

United States

#15 Sep 2, 2013
Did throttle body a week ago, and cleaned sensor. C-foamed vac. Hose from brake cylinder into engine and motor oil ran for 10 min. And changed it. Throttle body was nasty, kinda like dride doctor pepper.
chevy man

Spencer, OH

#16 Nov 2, 2013
It most likely the Hub. The bearings are in the wheel hub. It is one piece fully assembled. The hub cost $150.00 for a cheap one. I recommebd buying middle grade with a warranty. takes up to 4 hours to change out. You have to pull the brakes off to change them out. The hard part is disassembling everything. Easy part is putting it back together. You need a 33mm socket to pull the hub off . You tube has videos on how to do one. Brake sockets are metric too. I think they are 14mm or 15mm. Dont forget to use a torque wrench when installing all back together. Or part will start falling off your car. Mechanic will wind up doing one side for $400.00 to $600.00. Why i did mine myself. Its a no brainer once you see the youtube video on how to install one.
Liz

Lake View, NY

#17 Aug 16, 2014
It's most likely the fan clutch to the fan motor mines doing the same thing the parts $200 at advanced auto.

Since: Sep 14

Philadelphia, PA

#18 Sep 30, 2014
1st wheel bearings, 2nd belt tensionor and new belt, 3rd vibration from trans design (replace rear springs with special GM ones), 4th rust on rear sway bar mounting to body, 5th tire wear, 6th placement of luggage rack to prevent wind noise.
These all are GM service bulletins. There are MANY more!
I hope I shed some light for you.

Robert Master Auto Tech since 1977.
chatty

Toledo, OH

#19 Dec 24, 2014
I'm having same problem after I lifted my trailblazer 2004 Im some what of a mechanic I think my cv axle is bad I'm going to replace and I'll let you know if that fixed the problem.
Saab97X

United States

#20 Jan 4, 2015
I had the same issue, but found that after a car wash or during rainy weather the acceleration was smooth again. All I can think is that it is some sort of rubber mount that softens with the moisture and absorbs the vibration again?

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