GMPartsGiant.com offers the wholesale prices for genuine 1991 GMC Sonoma 4WD parts. Parts like Cruise Control 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 2.8L, 6 Cyl 4.3L. Model Code: PICKUP.