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1999 GMC 1500 Pickup Question: fuel pressure



, V8, Whitinsville, MA, March 05, 2009, 18:17

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

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  • Answer #1

    March 05, 2009, 18:58

    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.

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