[Reference Number]: 15131391, ALS1737, 5S7977 [Function]: Designed to improve the directional stability and steering ability of the vehicle when driving; Effectively transmit the speed of the wheels through the wire harness, back to the anti-lock brake system control module. [Directly Fit]: Replacement ABS Wheel Speed Sensor, Easy installation; Premium quality materials for a long service life; Output signal stable and Fast response time. Fit: For 2004-2007 For Trailblazer 2006-2009; Trailblazer EXT 2006 For Envoy 2006-2009; Envoy XL 2006 For 9-7x 2006-2009 Colour: Black Material:ABS Note: The appearance label printing may be different due to different batches, but it not affect the use Package Contents: 1x ABS Wheel Speed Sensor 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.