Yukon Denali AWD V8-6.2L (2007)
Fuel Pressure Release: Service and Repair
Fuel Pressure Relief
FUEL PRESSURE RELIEF
TOOLS REQUIRED
CH-48027 Digital Pressure Gage
WITH CH-48027
CAUTION:
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Refer to Gasoline/Gasoline Vapors Caution.
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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. Remove the engine cover, if required.
2. Loosen the fuel fill cap in order to relieve the fuel tank vapor pressure.
3. Remove the fuel rail service port cap.
4. CAUTION: Wrap a shop towel around the fuel pressure connection in order to reduce the risk of fire and personal injury. The towel will
absorb any fuel leakage that occurs during the connection of the fuel pressure gage. Place the towel in an approved container when the
connection of the fuel pressure gage is complete.
Wrap a shop towel around the fuel rail service port.
5. Connect the CH-48027-3 (4) to the fuel rail service port.
6. Connect the CH-48027-2 (2) to the CH-48027-3 (4).
7. Place the hose on the CH-48027-2 (2) into an approved gasoline container.
8. Open the valve on the CH-48027-2 (2) in order to bleed any fuel from the fuel rail.
9. Close the valve on the CH-48027-2 (2).
10. Remove the hose on the CH-48027-2 (2) from the approved gasoline container.
IMPORTANT: If relieving the fuel pressure for the fuel pressure gage installation and removal, it is NOT necessary to proceed with the
following steps.
11. NOTE: Clean all of the following areas before performing any disconnections in order to avoid possible contamination in the system:
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The fuel pipe connections