So I went to start the truck yesterday afternoon after having driven it in the morning. When I turned the key everything came on but it would not crank. I heard the pump cycle. I go pop the hood went back and turned the AC off and then it decided to start. It's been running fine now but I don't want to get stranded somewhere. Could it be a battery or maybe the starter? It has 89000 miles on it with no mods except a CAI. Any help would be appreciated.