Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
no communication between Suspension, Body Anti Brakes and transfer Case module
How did you figure this out? Did you pull one system at a time off the network until the issue resolved? Was the OnStar draining the battery down over time? Just curious as to how you found the issue and also what did you have to do to resolve it? Are you working on a writeup as that may be why you haven't said much. It would be a interesting read on how you went thru the process. Good thing is it's fixed now.
