Where is the drain plug on the radiator Nissan Frontier?
(2003 Frontier) From beneath the truck, pull back the leading
edge of the rubber splash guard that is below the radiator (it is
held in with push pins and 1 Phillips screw). Once this is pulled
back you can see the bottom of the radiator. In the center there is
a plastic plug with a Phillips head. This is the drain plug.
Unscrew it with a screwdriver and the radiator will start to