1. Replacement OE Number: 234 4256, 213 4229, 234 4407, 234 4651, 213 4229, 12609457, 12569429, 12573005, 12573167, 12611165, 92457789, 25024736 2. Applicable models The Upstream Downstream O2 sensor is compatible with 2003 2013 Chevy Silverado 1500 4.8L, 2003 2006 Chevrolet Express 1500 4.3L, 2005 2013 GMC Sierra 1500 6.0L, please see the pictures and details page for more supported models. 3. Material oxygen sensor is made of stainless steel and other materials, using high temperature resistant materials. It has been extensively tested during the manufacturing process. It has good stability, fast response and longer life, ensuring that your car will perform well after installation. 4. Installation InstructionsMade according to OE specifications, please note that you need to be very careful when disassembling, not to damage the exhaust pipe and oxygen sensor threaded parts, you need to use professional disassembly tools. In addition, the temperature of the exhaust pipe and oxygen sensor is very high after the vehicle is running. Be careful of burns and wait until the exhaust pipe has completely cooled down before proceeding to the next step.