3.1l. 3.4l.

Crankshaft Position Sensor

Helps keep engine timing and fuel injection running in sync Helps provide proper alignment, positioning, and spacing for easy installation Synchronizes engine valves and pistons for excellent engine performance

Map Sensor

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 This GM Genuine part is designed, engineered and tested to rigorous standards, and are backed by General Motors

Electronically informs the ECM of the throttle valve angle Used to regulate the fuel and ignition system

This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors