Q: how to replace ac compressor bearing on 2003 GMC Envoy

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
how to replace ac compressor bearing
(2) Answers
(1) Comments
I would advise you to obtain a good manual to follow - here is one you can get online:

That's ALLDATA - a good resource available to you at a modest cost.
I'm sorry; that's a little more complex than this forum can really address. This is why we refer questions like this to repair technicians on site at shops near you, or refer you to ALLDATA or Mitchell manuals to get detailed schematics and step by step instructions.

Replacing a compressor is complicated. Do you know why the compressor failed? Did it come apart internally? Is there debris in the lines? Is the orifice tube contaminated with debris? Is there refrigerant still in the system? Is the system fully charged, but the compressor will not power up? These are all questions that must be answered before describing the steps necessary to replace a compressor.

I would be remiss in suggesting a bolt on removal and installation of a compressor, including evacuate and recharge the system of refrigerant and injecting fresh compressor oil if I did not know all the facts.

Nothing - not RepairPal or anything else - can replace developing a good relationship with a local tech / shop.