GMPartsGiant.com offers the wholesale prices for genuine 1991 Chevrolet Lumina Base Model parts. Parts like Automatic Transmission Governor Feed & Shift Accumulator are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.5L, 6 Cyl 3.1L, 6 Cyl 3.4L. Model Code: 2 DOOR, 4 DOOR.