with native harness, sensors, etc, going into older vehicle, removing EGR, VATS, add some power, tweak the trans routine a bit, yada yada.

question is can i use 03 ECM/TCM OS pair, or it has to be 02? i can reflash the pair with a GM SPS system for an 02 if necessary, just don't want to bother if i don't have to bc i have an 03 ECM/TCM file i can use. thanks in advance.

-alex

i would think that it would work as long as your harness is the same year as your engine and your tune/ ecm can be any year as long as its still a lb7 and is tuned correctly as far as the year matchin the ecm , egr ect.
good luck, whats the engine going into sounds like fun ?:rolleyes:

thanks. it's going into 70s truck, it's not for me, it's for a customer. anyway, i used 03 calibrations.

sounds good , you should post some pics of the install when finished , good luck to ya !