1984 GMC Caballero 3.8L V6 VIN: 9. 1984 GMC Caballero 3.8L V6 VIN: A. Notes: Engine Fast Idle Relay -- For Mating Connector Use 1P1566. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.
