Parts Geek - For 1989 Chevrolet R2500 Radiator Cap API 14892ND. 1989 Chevrolet R2500 6.2L V8 DIESEL. 1989 Chevrolet R2500 7.4L V8. Notes: Radiator Cap -- Safety Lever; 16 lb. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.