Originally Posted by Mr pogo
I have a question.
I know GM has added different circuits to the obd2 port depending on the model/year.
does this device in any way change or affect the trans shifting parameters?
I ask because I remember the kits back in the day that used a resistor to change the maf reading so the trans would shift firmer and that your product somehow changes signals to keep AFM disabled.
No. We do not interrupt any of the current communication. There is a protocol to follow when communicating on the bus and we follow it. If you don't know what you're doing, you'll get check engine lights and transmission issues.
Hope this helps...