The fuel pressure specification for a 2004 Chevy Silverado varies slightly depending on the engine. You'll need to consult your owner's manual or a reliable repair manual specific to your truck's engine (e.g., 4.3L, 4.8L, 5.3L, 6.0L, etc.). These manuals will give you the exact fuel pressure specifications for your vehicle's engine at idle and possibly at other operating conditions.
General guidance: Expect the fuel pressure to be in the range of 50-60 PSI at idle for many 2004 Silverado engines. However, this is not a definitive answer and should not be used for diagnosis. Always refer to the correct specifications for your specific engine.
Failing to consult the correct specifications could lead to incorrect diagnosis and potential damage to your fuel system.
