1938-75 Buick, Chevy, Pontiac, Olds; Alternator Rear Rubber Boot Reproduction of the original alternator rubber boot designed for use with various 1965-75 GM models as listed. Each boot is manufactured in quality EPDM rubber replicating the original OE design. This boot is located on the wiring loom where it plugs into the rear of the alternator. This is an excellent reproduction of the original rubber boot.