GMC K25/K2500 Pickup Select the Engine of the Vehicle: 1986   8 Cylinders, 5.7L liter 1985   8 Cylinders, 5.7L liter 1984   8 Cylinders, 5.7L liter 1983   8 Cylinders, 5.7L liter 1982   8 Cylinders, 5.7L liter 1981   8 Cylinders, 5.7L liter 1980   8 Cylinders, 5.7L liter 1979   8 Cylinders, 5.7L liter   8 Cylinders, 6.6L liter < < BACK