C 1500 Truck 2WD V8-305 5.0L VIN M SFI (1997)
9.
Verify that the manual vent tool supplied from the J 42435 is in the non-venting position with the Allen screw fully seated counterclockwise.
10.
Install the manual vent tool into the HPL port.
11.
Slowly turn the manual vent tool Allen screw clockwise until natural gas begins to vent.
12.
Allow the CNG fuel tank to vent until the pressure gauge reads 0 kPa (0 psi). If the tank stops venting and pressure is indicated on the J 42435
gauge, inspect the vent line for a frozen fitting. The fitting will eventually thaw and fuel will again continue to vent.
Do not leave the tank unsupervised.
13.
Disconnect the vent hose (1) from the HPL.
14.
Remove the manual vent tool and all fittings.
15.
Remove the fuel inlet fitting from the HPL and discard the O-rings.
16.
Remove the fuel outlet fitting from the HPL and discard the O-rings.
