Dorman 911-003 Secondary Air Injection Check Valve

Reliable Secondary Air Injection Check Valve for Emission Control

The Dorman 911-003 Secondary Air Injection Check Valve is designed to maintain proper air flow in the emission control system of select Buick, Chevrolet, GMC, Oldsmobile, and Saab vehicles. Engineered with durable metal construction and a chrome finish, this solenoid valve supports efficient operation within a wide temperature range.

• Constructed from durable metal with a chrome finish for corrosion resistance
• Solenoid valve type ensures precise air flow control
• Inlet size of 0.88 inches and outlet size of 1.04 inches for proper fitment
• Includes valve and gasket for complete installation
• Operates reliably between -20 to 300 degrees Fahrenheit

Product Details and Specifications

The Dorman 911-003 is a secondary air injection check valve designed to prevent exhaust gases from flowing back into the air injection system. Its metal body with a chrome finish provides durability and resistance to heat and corrosion. The valve features a solenoid mechanism that regulates air flow, ensuring the emission system functions correctly. With an inlet size of 0.88 inches and an outlet size of 1.04 inches, this valve fits specific models from Buick, Chevrolet, GMC, Oldsmobile, and Saab, including the Trailblazer, Envoy, Bravada, Rainier, and 9-7x.

Compatible Vehicles and Applications

This secondary air injection check valve is compatible with the following makes and models:

• Buick 9-7x
• Chevrolet Trailblazer, Trailblazer EXT
• GMC Envoy, Envoy XL, Envoy XUV
• Oldsmobile Bravada
• Saab Rainier

Common Issues Addressed by This Valve

• Prevents exhaust gases from damaging the air injection system
• Helps reduce emissions by maintaining proper air flow
• Eliminates check valve failure symptoms such as rough idle or engine codes
• Prevents backflow that can cause catalytic converter damage
• Supports compliance with emission regulations

Installation Notes and Tips

• Includes valve and gasket for a complete replacement
• Ensure proper orientation of the valve during installation to maintain correct air flow direction
• Check for any damage or wear in connecting hoses before installation
• Recommended to replace the gasket to prevent leaks
• Consult vehicle service manual for specific installation procedures

Quality Assurance and Warranty

Dorman manufactures the 911-003 Secondary Air Injection Check Valve to meet or exceed OEM standards. The metal construction and chrome finish provide long-lasting durability under normal operating conditions. While specific warranty details may vary, Dorman typically offers coverage against defects in materials and workmanship. Refer to Dorman’s warranty policy for complete information.