No diagrams per se. Quite a few steps, including front seat removal.
Subscribe the car to www.alldatadiy.com. It's the GM service manuals plus a LOT more - multi-year subscriptions are cheaper per annum than a single year.
I can get you the diagrams but it involves taking the winshield out to access trim panels and to get the headliner out of the car and in some models removing the seats front and back so it is a pretty lengthy project to tackle and get it back in right.