fuel pressure on 1999 GMC 1500 Pickup

what is the correct fuel pressure with key on and running in ideal

by in Whitinsville, MA on March 05, 2009
1 answer
ANSWER by , March 05, 2009
The fuel pressure spec for 5.0L and 5.7L V8 engines is 60-66psi with pump running and engine off, 55-60psi with key on after pump turns off. Fuel pressure should hold steady after turning the key off.