Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hi there, I am Cam. There are a couple other things this could be. It could be a bad contact in the ignition switch (very common), possibly wiring or ground and connections. Knowing this, I would consider changing the ignition switch as they are cheap, 35-40 for an AC Delco one (document attached) and then check the wiring as outlined.
Check the vehicle for a possible weak battery or a dead battery in dual battery applications. Also check for possible poor battery cable connections, poor grounds, UBEC connections, or possibly an ignition switch dropping out during crank.