CTA Manufacturing Radiator Pressure Adapter - Chevy/GMC

Designed for the L5P Diesel Engine with two tank capsOne cap is located on the side of the tank (Vented) with right-hand threadsThe other is located on the top of the tank (Non-Vented) with left-hand threadsThis is designed to eliminate any chance of installing the non-vented cap where a vented cap is required?ATTENTION (Adapter is designed for the vented tank with right handed threads)O-rings on the center core seal off the tank vent port for proper testingCompare to GM factory tool GE-52098-AApplications:2017+ Chevrolet Silverado2017+ GMC Sierra w/ Duramax