Replaces part number:12639277,12639450, 97384931.12642623.TP3018.12664429 Function:Let the Engine Control Unit(ECU) and/or dashboard lamp indicator know when water detection has occurred in the vehicle's supply. Manufactured specification for fit, form, and function 1.PREMIUM QUALITY - Top quality Water in Sensor, also known as WiF sensor, usually in the filter, indicates the presence of water in the . This Water Sensor helps you detect water in and send you a warning; 2.FIT THE FOLLOWING VEHICLE - Water sensor fit for 2001-2011 Chevy 6.6L LB7 LBZ LML LGH LMM engine, including 2001-2011 Chevy Silverado 2500 HD, 2007 Chevy Silverado 2500 HD Classic, 2001-2006 Chevy Silverado 3500, 2007 Chevy Silverado 3500 Classic, 2007-2011 Chevy Silverado 3500 HD, 2001-2011 2500 HD, 2007 2500 HD Classic, 2001-2006 3500, 2007 3500 Classic, 2007-2011 3500 HD; 3.REPLACE PART # - Replace 12639277 12639450 97384931, commonly found on 01 02 03 04 05 06 07 08 09 10 11 Chevy Silverado 6.6 LB7 LBZ LML LGH LMM Engine; 4.DIRECT FIT - Direct replacement for a proper fit and easy installation, quality materials used, meets or exceeds standards. Material:Metal + plastic colour:Black + white Package Contents: 1 * Water in Indicator Sensor Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.