Full 1991 GMC Sonoma Review
What's New for 1991
Introduced in January, 1990, Sonoma is a S15 Pickup with a new name and an exterior facelift that includes a new grille, fresh trim and restyled wheels. Four-wheel drive models get the 4.3-liter V6 as standard equipment. High Sierra trim is dropped, and Sierra Classic trim is changed to SLE. Midyear, the base four-cylinder powerplant gets more horsepower.