The 6L80 started slipping WOT in the upper gears....
Car is making 760rwhp now....
So I just picked up a 42k mile CTSV 6L90 I'm going to send off for a 800hp rebuild.
How do I flash the TCM to work in my car?
I've heard I need a vin # to go with it, so...
Anyone have a stock ZL1 6L90 tune with VIN# they'd like to share to get me moving so I can drive it to my tuner?