It is located on the engine side of the large black lower radiator hose. You must remove the housing that the hose connects to to access it. Make sure to keep the housings gasket or buy a new one before starting.
The 5.2L was not available in 2003. Its last year was 2001.
5w30
32
There are a few reasons why there may not be any heat in a 2003 Dodge Ram 1500. Some of the reasons are a bad heater coil, blown fuses, or even a stuck thermostat.
260 I think
10w30
ATF
6 quarts 5w30
.040 inch
7 quarts with a new oil filter for the 5.7 liter hemi.
There are 4. They are located on ether side of the catalytic converters.
Should be in a removable housing at the engine end of the upper radiator hose