not2oldchevy

I need a part number for a 2003 5.3 that will hold 58-60lbs. New pump and filter old pump was noisy with 47lbs pressure, new pump quiet with 50lbs. Looked on rockauto and the new regulator had a setting of 50lbs. I still get lean codes with everything else new. No vac or exh leaks.

sfiore

Try a 1999-2003 corvette fuel filter/ regulator
Believe part no. Is GF822
Or check out tanks inc.
they have a LS filter regulator
With the cheapest price I have found

ls1nova71

iTrader: (4)

Corvette filter/regulator will only work with a returnless fuel rail. Sounds like the OP has a return style rail. The factory return style rail regulator should be regulated at 58psi if the pump puts out enough. The 50 psi ones on rock auto sound like flex fuel regulators since they're lower psi. Make sure to get the correct one since flex and standard are not interchangable.