1986 GMC Pick-up Truck Engine Gasket Set - Timing Cover 7.4L Engine - Naturally Aspirated - Sierra Classic - 4 Barrel Carb. - OHV - Contains Repair Sleeve guaranteed to replace your current 1986 GMC Pick-up Truck Engine Gasket Set - Timing Cover 7.4L Engine - Naturally Aspirated - Sierra Classic - 4 Barrel Carb. - OHV - Contains Repair Sleeve. 1986 GMC Pick-up Truck Engine Gasket Set - Timing Cover comes new OEM 1986 GMC Pick-up Truck Engine Gasket Set - Timing Cover aftermarket new 1986 GMC Pick-up Truck Engine Gasket Set - Timing Cover of remanufactured 1986 GMC Pick-up Truck Engine Gasket Set - Timing Cover 7.4L Engine - Naturally Aspirated - Sierra Classic - 4 Barrel Carb. - OHV - Contains Repair Sleeve.