ENCORE GX 20-25 1.3L. The compressor will include the compressor itself and the clutch. The clutch may be noisy during initial break-in from rust buildup. TRAILBLAZER 21-25 1.3L. MUST INSTALL A FILTER AND FLUID IN AN AUTOMATIC TRANSMISSION FOR IT TO FUNCTION AND THE TORQUE CONVERTER MUST BE ALIGNED TO THE PUMP DURING INSTALLATION.