K 2500 Truck 4WD V8-305 5.0L VIN M SFI (1998)
Canister Vent Valve: Description and Operation
Evaporative Canister Vent Valve
The Evaporative Canister Vent Valve replaces the fresh air vent used on the past EVAP canisters. The vent valve now not only allows the fresh
outside air to the EVAP canister during the purge modes, but also allows the diagnostic to pull a vacuum on the fuel tank by closing the vent valve.
This valve is normally open.
