× 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: GM 8 speed programming: TUN and PUN
Posted to Technical Discussion Forum on 7/1/2020 2 Replies

Alright, let me paraphrase so you can verify my understanding.

The TUN does not actually encode the characterization data, it encodes the build record for that trans. The GM servers can use the TUN to look up the build record which has the PUN saved and can ... Login to read more.

2 Replies Received (View Replies)