Description: All, without rear ac. Grand Am. With 6-rib cogged. 3.1L. 3.4 & 3.5L. Alero. Aztek, Rendezvous. 3.4l. 3.4L, 1st design. Allows for the operation of various pulleys, and drive belt accessories, with the use of a single belt Creates a secure point of contact with the pulley, which allows for traction Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type