C 1500 Truck 2WD V6-4.3L VIN X (2003)
Fuel Pressure Release: Service and Repair
Fuel System Pressure Relief
TOOLS REQUIRED
J 34730-1A Fuel Pressure Gage
CAUTION: Remove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of
personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel
injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before
disconnection. 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.
2. Install the J 34730-1A.
3. Loosen the fuel fill cap in order to relieve fuel tank vapor pressure.
4. Open the valve on J 34730-1A in order to bleed the system pressure. The fuel connections are now safe for servicing.
5. Drain any fuel remaining in the gage into an approved container.
6. Once the system is completely relieved, remove the J 34730-1A.
