đź’™Compatible With:Chevrolet:2002-2006 Avalanche 2500 8.1L,2000-2002 BUS 8.1L,1999-2009 Kodiak 8.1L,2003-2006 Silverado 2500 8.1L,2007 Silverado 2500 Classic 8.1L,2003-2006 Silverado 3500 8.1L,2007 Silverado 3500 Classic 8.1L,2003-2006 Suburan 2500 8.1L. đź’™Compatible With:GMC:2003-2006 Sierra 2500 8.1L,2007 Sierra 2500 Classic 8.1L,2003-2006 Sierra 3500 8.1L,2007 Sierra 3500 Classic 8.1L,1999-2009 Topkick 8.1L,2003-2006 Yukon XL 2500 8.1L. đź’™Alternate/OEM Part number:12563500,12574403,12677839,1S6890,1S8824.2561010,D1822A,PS413. đź’™Features&Installation:Manufactured from high quality materials chosen specifically for maximum performance and application suitability,Application specific design for quicker, easier installation.You can replace parts by yourself and solve your vehicle problems, just need to remove the old parts and install the new parts, so as to save you a lot of money and time. Please check youtube video if you have installation problem. đź’™Note:Make sure that the parts on pictures are the same as your old before ordering to avoid wrong purchases.100% undergo a strict quality tested before shipping. If it fails,simply contact us for a replacement or refund, we will reply you within 12 working hours. đź’™Compatible With:12677839 Oil pressure switch compatible with 8.1L Chevrolet:Avalanche 2500,BUS,Kodiak.GMC:Silverado 2500 Classic,3500 Classic,Suburan 2500,Sierra 2500 Classic,Sierra,Sierra 3500 Classic,Topkick,Yukon XL 2500.