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Your truck should have the factory air pressure monitor which tells you if you have a tire leaking. Most any auto parts store will have the two way tire gauge and air chuck you need to air up and check duals. If you don't carry your own compressor, you won't need the chuck; just find a truck stop tire shop to check and air up your tires. Your outside duals have the valve pointing in toward the truck; use the chuck facing you for those. The inside duals have the valve facing out; use the straight chuck for them. Stay away from the hose extensions because they mostly leak after a little while. On our '16 3500 DRW, I watch the pressure monitor and only physically check and add air maybe every 6 months.
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