Radiator Pressure Adapter Kit - GM/GMC
- Set is designed for the L5P Diesel engine with two tank caps
- One cap is located on the side of the tank (Vented) with right-hand threads
- The other is located on the top of the tank (non-vented) with left-hand threads
- GM designed this to eliminate any chance of installing the non-vented cap where a vented cap is required
- O-rings on the center core seal off the tank vent port for proper testing
