Telephone/Telematic Control Module -J526-, removing and installing: Notes

NOTE:

If the Telephone/Telematics Control Module is replaced, the OnStar® system needs to be reconfigured. See TELEPHONE/TELEMATIC CONTROL MODULE -J526-, REPLACING AND RECONFIGURING .
DO NOT exchange Telephone/Telematic Control Modules between vehicles!. Each module contains specific Station Identification (STID) and Electronic Serial Number (ESN) data unique to the VIN. This data is used by OnStar® and National Cellular Telephone Network to identify the vehicle and administer the customer's account.