OER Parts offers a wide selection of Manual Transmissions & Parts for your 1991 Buick All Models. OER Parts offers 1991 Buick All Models Bearings, 1991 Buick All Models Boots, 1991 Buick All Models Complete Transmissions, 1991 Buick All Models Flywheel, 1991 Buick All Models Gaskets, Seals & Filters, 1991 Buick All Models Gears, 1991 Buick All Models Hardware, 1991 Buick All Models Shift Knobs, 1991 Buick All Models Shift Linkage, 1991 Buick All Models OE Shifters, and 1991 Buick All Models Performance Shifters.