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Home >> Chevrolet >> 2004 >> Impala Police >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System 3.4L (Introduction)) >> Description and Operation >> Evaporative Emission (EVAP) Control System Description >> EVAP System Components >> EVAP Canister
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EVAP Canister

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The canister is filled with carbon pellets used to absorb and store fuel vapors. Fuel vapor is stored in the canister until the control module determines that the vapor can be consumed in the normal combustion process.