1989-1991 Chevrolet R1500 Suburban Scottsdale VIN: K FI Naturally Aspirated GAS. 1989-1991 Chevrolet R1500 Suburban Silverado VIN: K FI Naturally Aspirated GAS. Notes: Oxygen Sensor. Before Catalytic Converter, Driver or Passenger Side Oxygen Sensor, 1-Wire, Unheated.
