I went out to start my truck yesterday before work. As i turned the key, the dash lights dimmed, the radio went out, and it made a sound like it was going to start but didnt have enough power. Jumped it off, ran fine. went to work, came out after and started the truck again. it was a little slugish to actually start, but after some hesitation did. woke up today same thing as the day before, lights dimmed radio shut off and time reset on clock, had to jump it off. except now the check engine light is on. had onstar run on-demand diag and they came back with that code. now im at a loss.

 

P0336 - Crankshaft Position Sensor Circuit A Range/Performance