Dorman 911-301 Vapor Canister

OE-Style Vapor Canister for Emissions Control

This Dorman vapor canister is built to match the original equipment evap canister used on select Chevrolet, GMC, and Hummer applications. It restores evaporative emissions system function with a charcoal filter element, black plastic housing, and direct-fit port layout.

Compatible With 2004-2012 Chevrolet Colorado, 2004-2012 GMC Canyon, 2006-2010 Hummer H3, and 2009-2010 Hummer H3T. Part number 911-301 is a practical replacement when the factory canister is cracked, saturated, or no longer controlling fuel vapor storage correctly.

Key Features

• OE-style vapor canister for evaporative emission control repair
• Charcoal filter element included for vapor adsorption
• Black plastic housing for underbody installation
• Three-port design with port outside diameters of 0.318, 0.625, and 0.627 in.
• Length: 12.25 in.
• Package contents: vapor canister and mounting bracket
• Cross-reference part numbers include 4B1202 and 15166275

Detailed Description

Dorman 911-301 is a replacement vapor canister engineered to match the original equipment evap canister on select vehicles, helping restore emissions control performance without changing the factory-style layout. The canister uses a charcoal filter element inside a plastic housing and is configured with three ports to match the vehicle’s evaporative plumbing. This part number 911-301 is listed for Chevrolet Colorado, GMC Canyon, Hummer H3, and Hummer H3T applications across the model years shown.

This part cross-references Standard Ignition CP433 and CP523 for the same application.

What It Helps Address

• Check engine light related to evaporative emissions faults
• Fuel vapor storage problems caused by a saturated canister
• Cracked or damaged vapor canister housing
• Evap system odor concerns from poor vapor containment
• Factory canister replacement needs on Colorado, Canyon, H3, and H3T models

Installation Notes and Tips

Verify port sizes, mounting location, and hose routing before installation. Transfer any vehicle-specific connections as required by the application, and inspect adjacent evap hoses and seals for wear while the system is open. Confirm the canister is secured correctly with the supplied mounting bracket and that all lines are fully seated after installation.

Quality Assurance

This Dorman vapor canister is made to match the original equipment evap canister on select vehicle years, makes, and models, supporting proper emissions control restoration for the listed applications.