[Stephen12ZL1]

This isn't incredibly difficult but a few things need to be stated.

The independent differential pumpkin (center section) is held in place with three fastening points: one accessible from the rear of the vehicle: a 24mm headed M16 x 2.0 bolt which goes through the subframe and two forward bolt/nut combo which require an 18mm ratchet & wrench.

You must first remove the axle retaining bolts on each side which works easiest with an impact & extension with appropriate torx (star) socket. You will need to put the car in neutral and rotate the axle to gain access to all of the bolts. They are pretty well "loctited" in position with GM green loctite so be careful and don't round the heads. I removed the wheel speed sensor and repositioned the upper control arm to get straight line access to the bolts.

You must remove the cooling lines under the diff. After pushing the black plastic rings away, use a pick to release the retaining clips in all four positions. Remove the 10mm retaining bolt. Be careful not to lose the little clips. Remove these lines and set aside. Unplug the e-diff weatherpack and unplug the passenger suspension position sensor.

There is a control module that has two 18mm sized lines that must be removed. These lines continue through the subframe and have a peculiar Eaton quick connect at the differential. A small trim removal tool fork needs to be inserted between the rubber part and the differential. If it takes a lot of force, you are doing it wrong. Once the appropriate sized fork is placed there, it simply pops off.

Hopefully this info will be useful to someone. Thought this info was worthy to share.