Dorman 911-150 Secondary Air Injection Check Valve

Reliable Secondary Air Injection Check Valve for Buick and GMC Vehicles

The Dorman 911-150 Secondary Air Injection Check Valve is engineered to maintain proper airflow in the emission control system of select Buick, Chevrolet, GMC, and Saab models. Designed with durable materials and precise dimensions, this valve supports efficient operation of the air injection system in vehicles like the GMC Envoy and Chevrolet Trailblazer.

• Constructed from cast aluminum for strength and corrosion resistance
• Natural finish complements engine components
• Inlet size: 1 inch; outlet size: 1.5 inches for optimal airflow
• Valve type made of ductile iron for durability under high temperatures
• Includes valve and gasket for complete installation

Durable Materials and Precise Fitment

The Dorman 911-150 features a cast aluminum body that offers a balance of lightweight design and resistance to corrosion, ensuring long-term reliability in the secondary air injection system. The valve’s ductile iron construction provides strength to withstand the thermal and mechanical stresses common in emission control components. With a 1-inch inlet and 1.5-inch outlet, this check valve is designed to fit specific air injection system configurations found in Buick 9-7x, Chevrolet Trailblazer, GMC Envoy XL, and Saab 9-7x models.

Compatible Vehicles and Applications

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

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

It is designed to regulate airflow in the emission control system, helping reduce harmful exhaust emissions and supporting compliance with environmental standards.

Common Issues Addressed by the Dorman 911-150

• Prevents backflow of exhaust gases into the air injection system
• Eliminates secondary air injection system failure codes
• Reduces rough engine idle caused by faulty check valves
• Helps restore proper emission control system function
• Prevents damage to the air pump and related components

Installation Notes and Tips

Installation of the Dorman 911-150 check valve requires removal of the old valve and gasket. Ensure the mating surfaces are clean and free of debris before installing the new gasket and valve. Tighten fittings to manufacturer torque specifications to avoid leaks. This part is designed for direct replacement on compatible Buick, Chevrolet, GMC, and Saab models listed above.

Quality Assurance and Warranty

Dorman manufactures the 911-150 Secondary Air Injection Check Valve to meet or exceed OEM standards for fit, form, and function. The use of cast aluminum and ductile iron materials ensures durability and resistance to corrosion and heat. This part comes with a limited warranty covering defects in material and workmanship, providing confidence in its long-term performance.