HSTECH 72-4568 2 Pairs (4 Pack) Speaker Harness for Selected General Motor Vehicles Total Adapters. Speaker Adapter Harness's allow for easy installation of aftermarket or replacement speakers for use in select Buick, Cadillac, Chevrolet, GMC, Pontiac, Oldsmobile, Saturn vehicles. Connects speakers to factory harness. 4 Total Harnesses Included - 2 Pairs Included. Plugs directly into aftermarket car speakers. Includes retention tab for factory wire retainer.