Mass Air Flow Sensor Reference Part Number 1.25168491 - Replaces the following part numbers: AF10043, 25318411, 2134160, 213-3640, 868411, 86-8411, 15904068, 19330121, 25168491, 8159040680, 8193301210, 8253184110, 748411, 917826, 1581465, 2451107, 5S2636, SU1287, SU9516, SK2451107, 28411M, MA145, MAS0203. Please check your vehicle information before purchasing. - Vehicle fitment overview: This mass airflow sensor is compatible with a wide range of GM vehicles. The following models are supported Chevrolet - Silverado 1500, 1999-2006 - Silverado 1500 HD, 2001-2003, 2005-2006 - Silverado 2500, 1999-2004 - Silverado 2500 HD - Silverado 3500, 2001-2006 - Suburban 1500 - Tahoe, 2000-2006 - Avalanche 1500 GMC - Sierra 1500, 2500 - Yukon XL 1500, 2500, 2000-2006 Buick - Rainier, 2004-2007 Cadillac - Escalade, 2002-2006 - Escalade ESV, 2003-2006 - Escalade EXT, 2002-2006 Oldsmobile - Aurora, 2001-2003 Hummer - H2, 2003-2009 Isuzu - Ascender, 2003-2006 - Additional compatibility with Chevrolet, GMC, Hummer and others: Chevrolet - Silverado 1500 Classic, 2007, 4.3L, 4.8L, 5.3L - Silverado 1500/2500 HD Classic, 2007 - Silverado 3500 Classic, 2007 - Trailblazer, 2006-2008 GMC - Envoy, 2005-2009, 4.2L, 5.3L - Sierra 1500/2500/3500 HD Classic, 2007 - Sierra 3500 Classic, 2007, 6.6L, 8.1L Hummer - H2, 2005-2007 Isuzu - Ascender, 2003-2006, 4.2L, 5.3L Oldsmobile - Aurora, 2001-2002 Pontiac - GTO, 2005-2006 - Bonneville, 2005-2006 Saab - 9-7X, 2008-2009 - Function and benefits - The mass air flow (maf) sensor, also referred to as an air quality sensor, measures the volume of air entering the engine - Enables precise fuel metering, crucial for optimizing engine performance and maintaining emission standards - This replacement sensor ensures accurate airflow detection, supporting smooth vehicle operation and enhancing overall engine efficiency