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I think I have the same thing as you, but have not checked mine out. I also think someone on here mentioned checking the rear trailing arm bushings.
No warranty will pay to install a part that’s not a direct replacement. I’m sure they’ll pay for a Dorman pos or any other replica of the original part but the H3 mount isn't called for in any parts books for your truck. But maybe you can get a shop to swap the part out if you pay for the H3 mount.Found my "thud"....broken driver side motor mount. Popped the hood, put it in gear and torqued the motor.....driver side lifted up. About to try out my Car shield warranty on it and have it changed with the H3 mount.
At >100K miles, if you haven't replaced a motor mount, it is the motor mount. AND in the outside chance it is not, it soon will be, so replacing the driver's side motor mount with the Hummer mount will be money well spent.
No warranty will pay to install a part that’s not a direct replacement. I’m sure they’ll pay for a Dorman pos or any other replica of the original part but the H3 mount isn't called for in any parts books for your truck. But maybe you can get a shop to swap the part out if you pay for the H3 mount.
the trick is when you want to use the parts you want then you "agree" the pay the difference in price for the part, that's all you have to do. they cannot deny you the right to use whatever part you want but they can refuse to pay more than what the book tells them to, so lets say the autozone motor mount was $80.00 and the H3 mount was $123.00 then you just agree to pay the $43 difference, labor is the same either way.Took it to the shop. He called up Car Shield, argued with them over .2/hour of labor, finally said ok. They sent Auto Zone parts for him to change them. Not entirely bad, as I would probably have done the same. So, $50 deductible, changed both motor mounts and trans mount. Next time I will take it to a dealer for the repair and see what happens there.
Not trying to jumpin and give you more stuff to worry about but, I had that same clunk that your describing and could not track it down for a good 4 months. last week I lost my transfercase and replaced it with a used transfercase and now it is completely gone. no clunk and truck seems more responsive to acceleration.
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2007 GMC yukon Denali 6.2l running the Borg Warner 4485 RP3What year make and model?
2007 GMC yukon Denali 6.2l running the Borg Warner 4485 RP3