Description: LaCrosse. 3.6l. Regal Sportback. 3.6l. 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