2007 Tahoe/Weird clunking when gas is pressed

[Damsinitial]

Got a 2007 Chevy Tahoe with 177Xxx , When I’m driving on the highway & I let off the gas and repress it, it will make a weird clunk noise.
I’ve searched everywhere online and can’t find anything about it.
its only when I’m in drive and it only does it sometimes.
sometimes it has a delay when I press the gas and then when I end up having power.

 

[CaptainAmerica1]

Motor mount

 

[OR VietVet]

Welcome to the forum from Oregon.

Where do you hear the noise? In front of you, under you or behind you? If in front, I agree with @CaptainAmerica1 and think it could be motor mounts. If under you, then may be trans mount. If behind you it could be diff gear slap or...

Can you feel it? In the steering wheel, under your butt, in the floorboard at your feet?

Do you know how to check for the engine mounts?

 

[Miami-Dade]

Welcome from Miami!

 

[TollKeeper]

I have a clunk in mine as well that I have been chasing. Its only when I accelerate from a stop light for me thou, mine is definitely in the rear end somewhere. Hope my control arm bushings, or whatever they are called, are good.

 

[Damsinitial]

Motor mount

I never thought about that, I’ll have to check it out thank you

 

[89Suburban]

Motor mount

At highway speed? He must be hammering the hell out of it. I can only feel mine thump on a hard accel from a dead stop.

 

[OR VietVet]

I have a clunk in mine as well that I have been chasing. Its only when I accelerate from a stop light for me thou, mine is definitely in the rear end somewhere. Hope my control arm bushings, or whatever they are called, are good.

More Information for ACDELCO 45D10160

More Information for ACDELCO 45D10231

Inexpensive at RA. Between $30 and $35 each depending on which ones, upper or lower.

 

[TollKeeper]

More Information for ACDELCO 45D10160

More Information for ACDELCO 45D10231

Inexpensive at RA. Between $30 and $35 each depending on which ones, upper or lower.

Thanks... Still gotta verify they are the problems... Momma's pregnant, so my focus is in other places at the moment.

 

[OR VietVet]

I never thought about that, I’ll have to check it out thank you

Your rig takes the same rear control arms, upper and lower, as @TollKeeper 06 Escalade, in post #8. If the noise is in the rear. Have not heard from you yet where the noise appears to be coming from. Secret?

 

[OR VietVet]

Thanks... Still gotta verify they are the problems... Momma's pregnant, so my focus is in other places at the moment.

Without a doubt.

 

[Fless]

In addition to the other suggestions give those driveshaft u-joints a good inspection.

 

[donjetman]

worn out transfer case

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

1. Slip yoke on the front of the rear drive shaft going into the transmission.
2. Motor mounts
3. Front differential support mounts (This was the cause of my clunk issue - replaced the 2 mount arms and bushings, each sold as one unit)

 

[2010ppv03]

First time I drove my 2010 Tahoe, I could swear up and down the noise was coming from the rear end. Turns out, the motor mounts need replacing. I did purchase the hummer H3 motor mounts with the solid rubber.
Easy way to check, open the hood, start the vehicle, put in drive, hold one foot on brake and hit the gas, you will see your engine move and hear the clunk at the same time. Got the motor mounts off Amazon.
GM Genuine Parts 25847739 Engine Mount https://www.amazon.com/dp/B010GPIUB...abc_GGEFKDH3B6WJ8CM6KJEV?_encoding=UTF8&psc=1
Good luck

 

[Streborel]

Got a 2007 Chevy Tahoe with 177Xxx , When I’m driving on the highway & I let off the gas and repress it, it will make a weird clunk noise.
I’ve searched everywhere online and can’t find anything about it.
its only when I’m in drive and it only does it sometimes.
sometimes it has a delay when I press the gas and then when I end up having power.

Absolutely motor mount.

 

[retiredsparky]

As mentioned above, the transfer case can also cause this noise. There is a large chain in the case that transfers power to the back and front differentials. That chain can wear and stretch, causing a clunking noise.

This possibility does not rule out the motor mounts.