I feel a clunk from a stop.

[BUCKSATH]

Hi all. I tried to search around, but I couldn’t find exactly what I was looking for. I’ve got a slight “clunk feel” coming from my wife’s 17 5.3 LT suburban with 150k. So it’s not a noise it’s just a “feel” when I take off from a stop. I haven’t checked the u joints yet but could it be anything else? Any help would be appreciated.

 

[B-train]

Maybe the slip yoke at the trans output shaft. Used to be common years back. If the splines get dry or worn, they can make noise, or feel like a clunk when it moves under acceleration

 

[iamdub]

Hi all. I tried to search around, but I couldn’t find exactly what I was looking for. I’ve got a slight “clunk feel” coming from my wife’s 17 5.3 LT suburban with 150k. So it’s not a noise it’s just a “feel” when I take off from a stop. I haven’t checked the u joints yet but could it be anything else? Any help would be appreciated.

Broken driver side engine mount? It often feels and sounds like it's coming from behind you.

Pop the hood and powerbrake it while you watch the engine from the gap where the back of the hood meets the cowl.

 

[OR VietVet]

Welcome to the forum from Oregon.

Had a recent feel and noise like that and was sway bar related.

 

[BUCKSATH]

Maybe the slip yoke at the trans output shaft. Used to be common years back. If the splines get dry or worn, they can make noise, or feel like a clunk when it moves under acceleration

I’ll check that out.

 

[BUCKSATH]

Broken driver side engine mount? It often feels and sounds like it's coming from behind you.

Pop the hood and powerbrake it while you watch the engine from the gap where the back of the hood meets the cowl.

Broken driver side engine mount? It often feels and sounds like it's coming from behind you.

Pop the hood and powerbrake it while you watch the engine from the gap where the back of the hood meets the cowl.

Man I never would have guessed that but I’ll definitely take a look. Thanks

 

[Fless]

Sticky brake caliper or stuck caliper slides?

 

[Rokjhn]

My 2011 Avalanche had similar “clunk” and it was the drivers side motor mount. Common problem with GM trucks\SUV’s and a relatively easy fix.

 

[Ohannon7]

2019 Yukon XL here with a blown driver side motor mount due to increased stress on lowered vehicles (I think).

I don't want to spend $700 on an OEM mount bc it will blow again. Historically I upgraded to Energy Suspension urethane mounts but they don't make them for my Yukon so IDK what to do. Are others going OEM or aftermarket? TYVM & good luck OP!

 

[jyi786]

Like everyone said, it's the engine mount. 99% chance that's what it is.

It's a DIY job, I did mine myself. Just be prepared to get really dirty and do acrobatics.

 

[Marky Dissod]

2019 Yukon XL here with a blown driver side motor mount due to increased stress on lowered vehicles (I think).

I don't want to spend $700 on an OEM mount bc it will blow again.
Historically I upgraded to Energy Suspension urethane mounts but they don't make them for my Yukon so IDK what to do.
Are others going OEM or aftermarket? TYVM & good luck OP!

For your '19 Yukon, there may be no such thing as a Suburban 2500, but there's definitely such a thing as 2500 & 3500 Silverados with L8Ts.
Maybe the motor mounts for L8Ts are heavy duty? Hope they don't overcharge you.

 

[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.

You are already receiving sage advice from the knowledgeable folks on this Forum.

I would check your front differential mounts. That was the issue in my truck with a clunk similar to yours, and when the mounts and associated bushings were replaced, the clunk went away.

 

[Rokjhn]

Like everyone said, it's the engine mount. 99% chance that's what it is.

It's a DIY job, I did mine myself. Just be prepared to get really dirty and do acrobatics.

Amen to that, felt like I’d been in a prize fight afterwards. But I won with a lot of patience and busted knuckles!

 

[kemperboy01]

i had the same issue. what i thought was an engine mount (It was Bad or looked bad dry rotted) but after replacing a lot of parts i found that it was a bad strut and bad sway bar end links (even though i had replaced them). i could also feel as well as hear it

 

[Moosemoon]

I have that same clunk. 2001 Yukon XL 2500 4wd. Last place I took it said the driveshaft was resting on the frame. Haven't taken it in to be fixed. So don't know if that is the problem.
The engine had been removed and gone thru - reinstalled with O'Reilly mounts- I'm sure. Should they be replaced?
This is a great forum. I have received great info here. Thanks

 

[Fless]

I have that same clunk. 2001 Yukon XL 2500 4wd. Last place I took it said the driveshaft was resting on the frame. Haven't taken it in to be fixed. So don't know if that is the problem.
The engine had been removed and gone thru - reinstalled with O'Reilly mounts- I'm sure. Should they be replaced?
This is a great forum. I have received great info here. Thanks

I would recommend that you post your issue in the 2000-2006 section, for more focused responses.

 

[steve45]

To check for dry splines on the driveshaft, shift to neutral as you approach a stop. This will allow the splines to move as they want. If the clunk goes away when you shift back to drive and accelerate, your problem is the splines. GM makes a special, and quite expensive, grease for the splies.

 

[BUCKSATH]

I know it’s been a minute. So it’s definitely the driver side motor mount. My next question is what replacement part should I use. I’m okay with buying an original GM part ($110) because the original lasted 140k unless anyone has any other suggestions?