Silverado SS AWD V8-6.0L VIN N (2003)
Fuel Pressure: Specifications
FUEL PRESSURE
1. Command the fuel pump ON with a scan tool.
2. Observe the fuel pressure gage with the fuel pump commanded ON.
VIN Z ................................................................................................................................................................................................. 335-375 (48-54 psi)
Except VIN Z .............................................................................................................................................................................. 385-425 kPa (55-62 psi)