Dorman 911-300 Vapor Canister

Dorman 911-300 Vapor Canister

This Dorman vapor canister is built to match the original equipment evap canister used on select GM vehicles, helping restore evaporative emissions system function. It is a direct-fit replacement for applications such as the Buick Century, Chevrolet Impala, Chevrolet Monte Carlo, Buick Regal, Pontiac Grand Prix, and Oldsmobile Intrigue.

• OE-style vapor canister replacement for evaporative emissions service
• Charcoal filter element included for vapor storage and purge control
• Black plastic housing for a factory-style underbody fit
• 3-port design with 0.514 in. port outside diameter
• Length: 9.375 in.; inside diameter: 0.514 in.
• Compatible With 2000-2005 Buick Century, N/A
• Compatible With 2000-2005 Chevrolet Impala, N/A
• Compatible With 2000-2005 Chevrolet Monte Carlo, N/A
• Compatible With 2000-2004 Buick Regal, N/A
• Compatible With 2001-2004 Pontiac Grand Prix, N/A
• Compatible With 2001-2002 Oldsmobile Intrigue, N/A

The Dorman 911-300 vapor canister is engineered for vehicles that use a charcoal-based evaporative emissions storage unit to capture fuel vapors before they are routed through the purge system. This replacement helps return the evap system to proper operation on the listed Buick, Chevrolet, Pontiac, and Oldsmobile models while maintaining the original equipment style layout and port configuration. This part cross-references Standard Ignition CP442 for the same application.

Common Symptoms This Part Addresses

• Evaporative emissions fault codes related to vapor storage or purge flow
• Fuel vapor odor around the vehicle
• Failed emissions inspection tied to the EVAP system
• Cracked, saturated, or damaged charcoal canister housing
• Reduced evaporative system performance on the listed GM applications

Installation Notes

Verify port count, port diameter, and mounting location against the original canister before installation. Transfer any vehicle-specific hoses or brackets as required by the application, and inspect EVAP lines for cracks, blockage, or loose connections while servicing the canister. Confirm proper routing after installation and clear diagnostic trouble codes if the vehicle requires it.

Quality Assurance

Dorman manufactures this vapor canister to match the original equipment evap canister on certain vehicle years, makes, and models, with fitment and construction intended to restore emissions control function on the listed applications.