Car Problem Reports

GMC Sierra 1500 HD Check Engine Light Due to Restricted Secondary Air Injection Check Valves

 
GMC Sierra 1500 HD Problem
8 Reports
Me Too
Edit

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

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.

Ask a Question