2011 GMC Yukon Denali makes a thump noise upon take-off

[ddrakenfd22]

I have a 2011 GMC Yukon Denali that makes a thump upon take-off, the driverside motor mount has already been replaced. Does anyone have any advice for what may be happening.

 

[Doubeleive]

I have a 2011 GMC Yukon Denali that makes a thump upon take-off, the driverside motor mount has already been replaced. Does anyone have any advice for what may be happening.

if not still a motor mount, then front diff mounts they disintegrate over time

 

[j91z28d1]

I have a 2011 GMC Yukon Denali that makes a thump upon take-off, the driverside motor mount has already been replaced. Does anyone have any advice for what may be happening.

how long ago and what mount was used?

 

[petethepug]

Welcome from SoCal.

What’s your milage and do you happen to know if the previously replaced motor mount was OEM and / or the fluid filled version for the Denali & Escalade?

Replacement of just one motor mount taxes the burden on the other used mount similar to why shocks are always replaced in pairs. The other mount may have failed.

The clunk can be sway bar bushings, front diff (dog bone) mount bushings, a front strut mount bushing or even a upper / lower control arm / tie rod end or rack bushing.

You’ll need a shop to pry & poke all of them to find the culprit. At 100k all of those should be replaced regardless.

 

[swathdiver]

Check the new mount, check the brackets that the front differential bolts too and also inspect your universal joints and the yoke going into the back of the transmission/transfer case.

 

[Joseph Garcia]

I say that you have a 90% change that it is the front differential mounts. Been there, done that. Purchase the 2 mount arms with bushings already installed to make the job easier.

A lesser chance it is the slip yoke on the front end of the rear driveshaft coming out of the transmission assembly. Replace it with a nickel plated slip yoke.