Description: Encore. Eng. vin b - luv. Sonic. 1.4l. Cruze, Cruze Limited. 1.4l. Trax. This part requires programming and/or special setup procedures GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle Helps provide air flow for proper fuel/air mixture Allows for a quick throttle response Assists in cold engine starts This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors