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The error code P0496 on a Chevy Traverse indicates a problem with the EVAP canister purge valve leading to excessive purge flow from the evaporative emission system. Potential causes include a faulty PCM, wiring harness shorts, a vapor canister purge valve stuck in open position, or a malfunctioning fuel tank pressure sensor. Common symptoms include rough idling, illuminated check engine light, and starting issues. To check the purge valve, disconnect the hose from the valve while the engine is running and block the hose with your finger. If you feel suction, it indicates a failed valve that is stuck open.
This code on a Chevy Traverse signals that there is a high purge flow in the evaporative emission system.
Abundant flush of air.