D150 1/2 Ton Pickup 2WD L6-225 3.7L VIN H 1-bbl (1983)
Evaporative Emission Control Canister: Description and Operation
All models use a maintenance free charcoal canister. The charcoal canister is used to store fuel vapors from the carburetor (if equipped} and fuel tank
until they can be drawn into the intake manifold.