Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
This sounds like the starter relay clicking just the one time. Try grabbing the starter relay and wiggling it in the socket to feel if it's loose and if so see if it cranks over now. If so and/or it was loose try a new relay and also feel if the new one is also loose. If so, and the problem persists, the socket could be worn out.
Did you try any of that I mentioned?