Removal (Cab & Chassis)
WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Combustible Gas Detector (J-45878) is required for this procedure. See Figure
.
- Remove the CNG fuel tank. See FUEL TANK . Remove the fuel line hold-down clips. Disconnect the fuel line at the fuel filter inlet. Disconnect the fuel line at the High Pressure Regulator (HPR) inlet. Remove the fuel lines from the vehicle.
- Remove the fuel filter bracket mounting bolts. Remove the fuel filter/fuel line assembly from the vehicle. Partially drain the engine coolant. Loosen the hose clamps enough to move the clamps away from the HPR coolant fittings. Disconnect the HPR coolant hoses from the HPR. Pull the HPR coolant hoses through the tank mounting frame. Disconnect the HPR fuel outlet line.
- Remove the HPR fuel inlet fitting. Capture the filter spring, filter and seal that are located behind the inlet fitting. Do not hold the HPR at the cover hex flange. As required, wedge a wrench between the HPR and the tank frame in order to keep the HPR from spinning in the bracket. Remove the HPR mounting nut and washer. Remove the HPR from the mounting bracket.
- Remove and discard the tank mounting plate to vehicle frame bolts and nuts. Remove the CNG fuel tank mounting plate from the vehicle.