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Home >> GMC >> 1989 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Evaporation System >> Operation >> Auxiliary Canister

Auxiliary Canister

On models with dual fuel tanks, an auxiliary canister is included with the primary canister to increase canister capacity. Auxiliary canister is connected in-line to purge air inlet of primary canister.

Vapors overflowing from primary canister are stored in auxiliary canister. During purging, excess vapors are routed to intake manifold.