New OEM (GM# 12609719) (ACDelco #12609719) DRIVE BELT TENSIONER, (2 BOLT DESIGN REPLACES 3 BOLT DESIGN, DISCARD UNUSED BOLT) (Out of Box). The Only Difference Between This 12609719 Original Tensioner Assembly With Original Pulley And Bolt And 12609719 In An (ACDelco In Box) Is The Price of the label !
