@wsteele @swathdiver @Fubar0715 I just replaced the passenger side motor mount, transmission mount, and sway bar bushings. This is what I did:
- Remove the front tires
- Remove the manifolds heatshields and fender liners.
- Remove steering shaft above motor mount if replacing driver side, undo the bolts and push it towards the firewall to remove it from the steering joint.
- Undo the bottom 3 bolts on both the driver and passenger side motor mounts, I bought a very VERY long 1/2 inch extension and I was able to get them from above using an impact drill. You can also get at some of these from the fenders.
- Undo the nuts and bolts for the transmission mount.
- Remove the starter, its 2 bolts and then I just let it hang down.
- Then jack up the drivetrain at the location of the drain plug using a 4x4 or 2 between the jack and the oil pan.
- At this point the transmission mount can be taken out so install the new Trans mount.
- Undo the top 4 bolts on the motor mounts. The metal shield on the mounts can be manipulated to make things easier, I started by opening the metal up to expose more of the bolts.
- On the driver side I was able to get at these 4 bolts from the fender using some deep sockets, a 1/2 inch swivel head ratchet, and a 1/2 inch "Flex Head Stubby Ratchet".
- Remove the driver side mount by compressing the metal shield and pulling it out the top where the steering shaft used to be. I was able to remove this one in 1 piece.
- Install the driver side mount using only the 4 top bolts.
- Remove the 4 top bolts on the passenger motor mount. I was able to get at 3 bolts from the fender using some deep sockets, a 1/2 inch swivel head ratchet, and a 1/2 inch "Flex Head Stubby Ratchet". The bottom right bolt I had to use my very VERY long 1/2 inch extension to get at it from under the steering rack, if you get on your back you can thread the needle of the steering rack, crossmember and diff you can see the last bolt.
- Removing the passenger motor mount was the most difficult part. I had to remove the 2 nuts on the mount to take it apart and make it easier to remove.
- Install the passenger side mount, the Hummer H3 mount is easier to install than the factory but this was still a very hard task. Use only the 4 top bolts.
- Lower the drivetrain and install the nuts and bolts for the transmission mount and the lower 3 bolts for both motor mounts. I had issues with the transmission not lining up to the mount holes so I just jacked up the drivetrain just a little bit and lined up the transmission to the trans mount with a screw driver through the bolt holes then I installed the trans mount bolts a few turns to keep it lined up then I dropped it back down again and finished tightening everything.
- Reinstall the starter.
- After that you just need to button everything back together, the manifold heatshields and the fender liners.
This job took me about 4.5 Hours. I used AcDelco part number 25847739 on both sides.