Description: Express, savana. 4.3l. All models. 4.3l. 4.3L, with ac. 2003-14, with ac, 125 amp. With ac compressor. 125 amp alt. 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