Where is evaporative emission control system vent valve on a 2001 Chevy Express van?

The evaporative emission control system vent valve on a 2001 Chevy Express van is typically located near the fuel tank, often mounted on or near the canister assembly. It can usually be found underneath the vehicle, towards the rear, and may require removing some undercarriage panels for access. Always refer to a repair manual for the exact location and any specific removal instructions.