anfking6908

Ive got A 08 silverado rcsb 5.3. It's all of a sudden havering a hard time starting. It will spin over for 3-5 seconds befor it bearly kicks to life. After its started it runs like a champ and it has no check engine light on at all. 89,822 miles on the truck. Any ideas on what could be wrong? Also it is a flex fuel engine but I only run high octane gas in the truck

raptor700rnut

Its possible that you have a fuel pump module that has a bad check valve and is bleeding the fuel pressure back to the tank when you shut it off. So everytime you restart it, it has to prime the system again. Does it puff black smoke when it starts? If it does, you might have a leaky fuel injector. Just a few things that come to mind.

anfking6908

No black smoke. Can I order this check valve or am I going to have to buy a new fuel pump?

raptor700rnut

You have to buy the whole module. If you do replace it, use one from a dealer or get the delphi replacement. Delphi is what gm uses. Get a fuel pressure guage and check it when you shut it off and see if the pressure drops.

anfking6908

Ok. Well I calle the local dealership and they said that it is covered under factory warranty. Thanks for the help

ltr450ryder

iTrader: (13)

i had the same problem on my 01 and it was the fuel pump