CPI (4.3L)
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Yukon, 1994 GMC Suburban, 1994 GMC Pickup, 1994 GMC Cab & Chassis, and 1994 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Fuel system is under pressure, which must be relieved before servicing fuel system. Fuel pressure may be relieved by one of following methods.
- Disconnect fuel pump at rear body connector. Start engine and allow it to run until it stalls. Crank starter 3 seconds to remove remaining fuel from fuel lines. Reconnect rear body connector.
- Install Fuel Pressure Gauge (J-34730-1) on fuel pressure connector of fuel rail. Wrap shop towel around pressure connection when installing fuel pressure gauge to absorb fuel leakage. Place gauge bleed hose in container. Open bleed valve to relieve fuel pressure.