jerem0621 wrote:
Thanks for the feedback. It's a trade in at a Chevy Dealership. I couldn't find any service record in the truck.
The truck had been sitting for about four days so it was dead cold and it started within 3-5 seconds once I hit the starter. I was pretty suprised how quickly it started. The EGR cooler appears to be intact.
The no records thing concerns me.
Thanks!
Jeremiah
Like Bedlam said, I would be concerned with the FICM if it had only been sitting for 4 days and needed a jump. Remember, the FICM's on these trucks have to convert battery voltage to 48 volts. Bad batteries are a real strain on them. I usually get 3-5 years out of my 6.0 batteries and they start getting weaker than I like. The cold start system on these trucks pull their power directly from the batteries for up to two minutes (depending on outside temp) before the alt is allowed to start charging.
Also, to be honest, my truck starts between 1-3 seconds. I hope you are just misjudging your time. If it takes 5 seconds there is more than likely a problem with the HPO system. The Computer will not fire the injectors until it reads a certain pressure which I believe is 600 psi minimum. It will crank for a certain amount of time and if it don't get the pressure it wants it will start closing the pressure regulator until it gets that pressure. This indicates a leak in the HPO system (more than likely the SCT fitting). If it is the OE fitting , it will get to where it won't start. If it is the updated fitting then it was not put in correctly.