is 4x4 2004 ram... when I go to the highway the temp goes up, but in city stay low..?

I checked the radiator and looks fine, also the water pump seems working fine and the thermostad too. I canged the belt and the a/c compresor started making noise... could be that the problem?? Anyone??

Have you done any other work to the vehicle? How hot is the truck getting when you're on the highway?

On the highway gets very hot but not to the red mark, when I get in the city goes down closed to the middle... when I changed the belt it seems the a/c compresor started making a loud noise... I'm not sure if the air compresor is the cause... because all have to work together to mantaing the right temp... any sugg??

The A/C compressor shouldn't affect an overheating issue as it's on a separate system; A/C uses freon to cool, while radiators use coolant.

Have you tried getting the radiator & heater core flushed out? You might have built up deposits which are causing it to overheat; do you know how old the antifreeze it?