So I have a 09 Chevy Colorado V8 and have had this problem where in the morning if I drive for about 15mins or less and shut the truck off it won't start for about 30mins, then like magic after waiting it will start right up like nothing happened. Have any of you guys had this problem? I've replaced the starter, alternator, starter relay, battery, checked all the grounds and key ignition. I just live with it now because its so predictable and I don't know what else to do. Any advice would be much appreciated. Thanks.