× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: Obtaining GM Calibration ID
Posted to Technical Discussion Forum on 4/20/2012

Also, if it has a 4L80E then it has a PCM. If it has an Allison it has an ECM and a TCM. I'm assuming you're after transmission calibrations. Login to read more.