What did you do to your NNBS GMT900 Tahoe/Yukon Today?

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alpha_omega

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Question(s) for those of you who have replaced them. Engine motor mounts and “Transmission” mount.

Stick with OEM or has the community collectively found a better build quality with a different manufacturer?

If sticking with OEM - what is the difference in the ACDelco model numbers for their motor mounts (15854939 and 15854941)?

I’ve read a couple different postings on the do’s and don’ts from those who have taken on the task, but I couldn’t narrow down a specific brand since there were a few different names thrown around. Thanks.
 

R3cord303

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Question(s) for those of you who have replaced them. Engine motor mounts and “Transmission” mount.

Stick with OEM or has the community collectively found a better build quality with a different manufacturer?

If sticking with OEM - what is the difference in the ACDelco model numbers for their motor mounts (15854939 and 15854941)?

I’ve read a couple different postings on the do’s and don’ts from those who have taken on the task, but I couldn’t narrow down a specific brand since there were a few different names thrown around. Thanks.
I went with the OEM H3 mounts on the engine that aren’t oil filled. It shakes a bit more, but my dash doesn’t rattle any longer. I don’t think my transmission mount has been replaced. Or if it has, it was with the transmission
 

the_tool_man

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I'm having a HELL of a time getting motor mounts. I'm on vendor number 2. They're INSISTING on a VIN before they'll expedite the order with GM. This big brother draconian crap is driving me nuts. I looked up a valid VIN for an '09 Hummer H3 so it would match the motor mounts, and gave them my VIN for the transmission mounts. (holding breath)
 

Doubeleive

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Question(s) for those of you who have replaced them. Engine motor mounts and “Transmission” mount.

Stick with OEM or has the community collectively found a better build quality with a different manufacturer?

If sticking with OEM - what is the difference in the ACDelco model numbers for their motor mounts (15854939 and 15854941)?

I’ve read a couple different postings on the do’s and don’ts from those who have taken on the task, but I couldn’t narrow down a specific brand since there were a few different names thrown around. Thanks.
engine motor mounts are recommended to be replaced with the hummer engine mounts, they are solid rubber versus the liquid filled, I do not have the part number handy but I am sure someone will post it up or link to the thread on it.
 

the_tool_man

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I've chosen these, but have yet to successfully order them:

Motor mount [Hummer H3 solid rubber] (2): 25847739
Trans mount [GMC Yukon Denali AWD] (1): 15840278

The trans mount is no problem; stock part for my vehicle. The Hummer mounts are "on national backorder" with GM according to the sites I've used. They WILL NOT take an order without a valid VIN. Turns out, that part number is for one side (forget which). So even finding a valid VIN for a Hummer H3 gets flagged, because to them I'm ordering one of them wrong. I guess I could place separate orders, or find a second Hummer VIN. I'm going to see if RockAuto or another generic parts house has these. I'll have to pay more, but at least I'll get the parts. Sheesh.

EDIT: generic parts houses I checked are all out of stock. I guess word has gotten out on how good the H3 mounts work. I hate being the last one standing when the music stops.
 
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alpha_omega

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I'm having a HELL of a time getting motor mounts. I'm on vendor number 2. They're INSISTING on a VIN before they'll expedite the order with GM. This big brother draconian crap is driving me nuts. I looked up a valid VIN for an '09 Hummer H3 so it would match the motor mounts, and gave them my VIN for the transmission mounts. (holding breath)
That’s one of the problems I had, which is why I posted this question. I saw others mentioning the “Atomic” but also saw that one has some bad vibration issues.
Mine are not “broken” (as of yet), but as I am approaching 100k miles the need to change them is drawing near. Plus I currently have the exhaust manifold, plugs, wires and electrical connections all removed. So this would be as good of a time as any to do them.
 

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