Car Problem Reports

GMC Savana 3500 Check Engine Light Due to Restricted Secondary Air Injection Check Valves

GMC Savana 3500 Problem
8 Reports
Me Too

Model Years Affected: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008

Exhaust & Emissions Affected: Gasoline


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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