Brand new to this forum and haven't had time to do a indepth search but my 2001 sierra with a 5.3 is had to start as it gets hot outside.usually have to try and start it 2-3 tries before it will start. if it has sat for a few days it usually fires right away, if i drive it for a while and shut it off it starts right up if it only sits 5-10 minutes, any longer and i have to crank it several times to get it to start. put on new fuel filter no change. help
