Fuel Evaporation Control: Notes
WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 1990 Pontiac Sunbird, 1990 Pontiac Grand Prix, 1990 Pontiac Grand Am, 1990 Pontiac Firebird, and 1990 Pontiac Bonneville. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Two types of canister control valves are used on General Motors vehicles. One is fixed to canister (Type 1) and the other is removable (Type 2).