Installation Procedure
CAUTION:
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.
- Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
- Only if necessary remove the fuel tank shield. Refer to Fuel Tank Shield Replacement (TrailBlazer, Envoy) or Fuel Tank Shield Replacement (TrailBlazer EXT, Envoy XL) in Frame and Underbody.
- Remove the fuel pressure service connection cap, located near the fuel filter.
- Install the J 34730-1A fuel pressure gage to the fuel pressure service connection, located near the fuel filter. See Special Tools and Equipment .
- Turn ON the ignition.
- Place the bleed hose of the fuel pressure gage into an approved gasoline container.
- Open the bleed valve on the fuel pressure gage in order to bleed the air from the fuel pressure gage.
- Command the fuel pump ON with a scan tool.
- Close the bleed valve on the fuel pressure gage.
- Inspect for fuel leaks.
IMPORTANT:
Due to an access hole in the fuel tank shield, removal of the shield should not be necessary to access the fuel pressure service connection.
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.
CAUTION:
Do not drain the fuel into an open container. Never store the fuel in an open container due to the possibility of a fire or an explosion.