Check Engine Light Due to Restricted Secondary Air Injection Check Valve on Chevrolet Silverado 3500

One or both secondary air injection check valves may become restricted causing poor air flow resulting in illumination of the Check Engine Light. It is often recommend to replace both check valves even if a fault code is set for only one bank of cylinders. Replacing only one valve may result in a return trip to the repair shop.

RepairPal Verified
Average mileage: (–)
Exhaust & Emissions affected: Gasoline
7 model years affected: 2001, 2002, 2003, 2004, more2005, 2006, 2007
7 people reported this problem
0 people shared problem details
Related Items:
sinse the truck was new,once or twice a year it won't start, it will just set & grind, The nex...
One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail...
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

Related Content