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H3 Alpha motor mount replacements

SpinMonster

Member
Messages
12
Location
Colorado
Just sharing info from my recent repair:

I was getting a slight vibration just off idle even standing still and I took it to a shop that works on LS motors. Rock Mountain Competitive Research said my 2008 Alpha was suffering from hardened 16 year old motor and trans mounts. They replaced all of them with the mounts from the 2008 sierra/silverado and everything fit perfectly. The driver's side metal plate unbolts from the motor mount and fits the Silverado mount fine.
I'm posting to keep people from paying $300 for each mount. The hummer mounts are solid rubber and the sierra/silverado mounts have the gel type. My truck drives fine and no more vibration. None of my mounts were broken but rather just hard from age.

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