durable and easy to install. Fine workmanship and perfect style. Product Name: Knock Sensor with Harness And Gasket Manufacturer Part Number: 12601822 213-3521 89060413 12589867 Interchange Part Number: 10456603, 12575869, 12589867, 12597415, 12601822, 81045-66030, 917-, 213-3521, MS96587, 89060413 COMPATIBILITY: For Escalade Express 1500/2500/3500 1500/2500/3500 And So On (Complete Matching Models View Vehicle Adaptation) for Corvett 99-04 5.7L (LS1) 99-02 Express 1500 / 2500 / 3500 4.8L 5.3L,6.0L 03-07 4.8L,5.3L, 6.0L 02-06 1500 / 2500 4.8L, 4.3L, 6.0L 99-06 3500 4.8L,5.3L, 6.0L 01-06 Classic 1500 / 2500 / 3500 4.8L,5.3L,6.0L 2007 5.3L 04-05 Trailblazer 5.3L 03-05 for 5.7L (LS1) 99-02,GTO 2004 for Envoy 5.3L 03-05 1500 / 2500 4.8L,4.3L,6.0L 99-06 3500 4.8L,5.3L,6.0L 01-06 Classic 1500 / 2500 / 3500 4.8L,5.3L,6.0L 2007 / XL 4.8L,5.3L 00-06 for Escalade 4.8L,5.3L,6.0L 02-06 Escalade EXT 4.8L,5.3L,6.0L 02-06 Escalade ESV 4.8L,5.3L,6.0L 03-06 2005 for Bravada 5.3L 03-04 for 5.3L 04-05 for H2 03-07 Material: Metal colour: As Shown Package Contents: 2 x Knock Sensor 1 x Knock Sensor Harness 2 x Intake Manifold Gasket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.