K 1500 Yukon Denali AWD V8-6.0L VIN U (2002)
Fuel Pressure Release: Service and Repair
Fuel System Pressure Relief
TOOLS REQUIRED
J 34730-1A Fuel Pressure Gage
CAUTION: Relieve the fuel system pressure before servicing fuel system components in order to reduce the risk of fire and personal injury.
After relieving the system pressure, a small amount of fuel may be released when servicing the fuel lines or connections. In order to reduce the
chance Of personal injury, cover the regulator and the fuel line fittings with a shop towel before disconnecting. This will catch any fuel that
may leak out. Place the towel in an approved container when the disconnection is complete.
1. Disconnect the negative battery cable in order to avoid possible fuel discharge if an accidental attempt is made to start the engine.
2. Remove the engine sight shield.
3. Loosen the fuel filler cap in order to relieve the fuel tank vapor pressure.
4. Connect the J 34730-1A to the fuel pressure valve.
5. Install the bleed hose of the gauge into an approved container.
6. Open the valve on the gauge to bleed the system pressure. The fuel connections are now safe for servicing.
7. Drain any fuel remaining in the gauge into an approved container.
