2014 GMC no crank no start

Kessig4x4 · May 13

I have a 2014 GMC 3500hd with the 6.0 gas engine. The ignition cylinder was jamming up and ultimately would not turn no matter what. I drilled it out and replaced it as i would in an older vehicle. I was never able to program the new key the way they said i would be able to. At this point it is no longer saying service theft deterrent system and if i scan it im getting ignition voltage codes and lost communication to ecm codes. I have hptuners, at this point i disabled VATS to no avail and have since put it back to factory settings. The scanner seems to be reading all values and i dont see anything burnt up in the ECM. Not sure where to go from here and dealerships are backed up.

thanks

Kyle

davester · May 14

I would start with looking at the ignition switch bits you worked on/replaced, that something there is wrong. It can even be new parts being bad. The various computers failing are the least likely cause of your problem.

davester · May 14

and if the truck was built to be sold in canada, you will need a bidirectional computer and possibly a subscription to acdelcotds to relearn the security system.