Fuel Evaporation System: Maintenance

No adjustments are required with this system. Check system and replace air inlet filter (if equipped) in bottom of charcoal canister, every 30,000 miles. Regular inspection of system components should be made and defective components replaced as necessary.

Fig 1: Vacuum Hose Routing for Single-Canister

Courtesy of GENERAL MOTORS CORP.

Fig 2: Sectional View of Canister Control Valves

Courtesy of GENERAL MOTORS CORP.

Fig 3: Open-Bottom Canister (2-tube type)

Courtesy of GENERAL MOTORS CORP.