Non manufacture part installed on catalytic convertor.

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I have rattlening noise coming from right side of vehicle. Chevy 1500 Silverado has two smaller convertors coming off right & left side of engine, then going into master catalytic convertor. Right side of my vehicle has non-manufacuture weld and part on left side of catalytic convertor. Any reported issue of catalytic convertor recalls for 2003 Chevy Truck Models