Problem Reports
Chevrolet Silverado 1500 HD
Report: Check Engine Light Due to Restricted Secondary Air Injection Check Valves
Chevrolet Silverado 1500 HD Problem
Model Years Affected: 2001, 2002, 2003, 2004, 2005, 2006, 2007
Exhaust & Emissions Affected: Gasoline
Verified
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.
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Report #1Visitor, 2003 Chevrolet Silverado 1500 HD, 80,000 mi