Just replace the ride control module, sticker on it says it needs to be calibrated... how do I do that?

Chiltons might have something in their repair maunals. Other than that, I would just call Chevy or Cadillac for doing it properly or just having them do it if it is not spendy. I can only point you in the right direction,maybe one of the moderators could give you more information on this.

Module needs to be programmed with scanner,TECH 1, most likely a trip to the dealer. Tech 1 is a somewhat out of date tool (pre obd II), It's possible small shop maybe able to do it if they have a Tech 1. I would call around before going anywhere to make sure shop can do it, vs. get there to find out they can't.