LQ advice

[PTAddict]

Originally Posted by WSSix

You can load a Fbody program onto that PCM. No need to physically change the PCM out for another one. You'll want to stay cable actuated on the throttle body though. Going over to drive by wire requires another module for the go pedal and just adds unnecessary complications I think.

If the trans is a 4l80e, you can't just load an F Body tune and have it work. You'd need to get a "segment swap" done to an F Body tune in order to control the 4l80. But, although I'm not familiar with the differences with truck ECU, I don't offhand see any particular reason why you'd be better off starting with an F Body tune than the stock truck tune ... both will need extensive tuning considering the modifications proposed.