Silverado 1500 2WD V8-5.3L VIN B HO (2006)
Fuel Filler Hose: Description and Operation
Fuel System (Cab Chassis)
FUEL FILL PIPE
The fuel fill pipe has a built-in restrictor in order to prevent refueling with leaded fuel. Once the fill vent is obstructed, fuel backs up the fill pipe and
trips the dispensing nozzle. The front fuel tank vent runs into the rear tank to the top of the filler pipe assembly, which in turn vents to atmosphere. The
fuel tank vent valves are connected and route to the canister to collect hydrocarbon emissions during operation of the vehicle.