i have tried using alt keys and high speed to no avail. the circuit for the dlc and cig lighters had to be replaced, circuit was shorting and the customer took it to a dealer to have that problem fixed. after that i installed the dsp5 switch into the j3 ecm conn and go to do my full reflash and it will say i need a unlock key, then the ecm goes to an unknown state, then to a no crank/no start situation. then which i unhook the batterys for a bit then it will start fine.
please help i hate to have machine/computer out smart me...
thanks RA
its an 05 lly ext cab shortbed with aftermarket cd player