2005 Chevrolet Avalanche 1500 Q&A
2005 Chevrolet Avalanche 1500 Question: secondary air injection check valves
The secondary AIR injection check valves on your 2005 Chevrolet Avalanche should be located at the end of each of the AIR tubes attached to the right and left exhaust manifolds. The check valves separate the metal AIR tubes from the rubber AIR hoses. - Oakman
One or both secondary air injection check valves may become restricted causing poor air flow resulting in illumination of the Check Engine Ligh...