I am trying to help a friend, she has been having trouble starting her 2000 Tahoe 5.3L , she took it to a mechanic and he told her fuel preasure regulator was bad and causing fuel to back down into tank after sitting a while, quoted her 500.00 to change I told her hold off I will look into prices, well 50 dollar part and 450 in labour is insane, changed out the fuel preasure regulator last night in oh 15min. But it is still taking 3 cranks to start, looked under truck fuel filter looks new, truck runs well once started but I dont want her to have to replace fuel pump prematurely. I was thinking of doing a seafoam treatment on it. Any ideas. Thanks for any help. Mike

 

Check the fuel pressure.

 

Dr. Funk says fuel pump is wackO, replace s'il vous plait.

 

Fuel pump is bad, very common. It has a one way valve built into the assembly which has failed. The valve is not serviced separately.

 

Thanks guys, I figured fuel pump, told her when she has the cash I will replace it for her. Did it on my Tahoe in a gas station parking lot in a couple hours should be a little easier in my driveway, but man GM crammed that tank between the frame, not looking forward to it.