What is fuel pressure at rail for a Chevy vortec 6.0 2003?
The fuel pressure at the rail for a 2003 Chevy Vortec 6.0L engine should be between 55 and 62 PSI (pounds per square inch). This is measured with the engine running. Keep in mind that this is a *specification* and slight variations within this range are normal. If the pressure is significantly outside this range, there's likely an issue with the fuel system.