I can't beleive no one knows whats wrong with it. The mechanics don't know, the scan codes don't say squat. I love chevy but this is one i want to get rid of, i know of three other cars with same problems where the car engine turns, starts & runs a half hour then shuts off. Then I can't start it until the next day and it repeats itself. The funny thing is it was a reliable car once, now it's a good engine but wont spray gas. I can feed it fuel manually it will run as long as i feed it fuel but when i stop it shuts off. I put a new fuel pump on it and it did nothing. I checked the trouble codes it said nothing. Took it to a mechanic and he scratched his head so i took it to more mechanics they said hell if i know take it to the junkyard.