over heat in traffic

Make sure the fans are spinning in the right direction. Air should be pulled over the radiator from the outside of the vehicle. Make sure there's nothing blocking the front of the radiator. There's plenty of room between the grille and the radiator for something to get in there and block the airflow through the air conditioning condenser and the radiator. If you were very low on coolant or the cooling system was drained for some reason I can guarantee it was not refilled correctly. You MUST remove the upper radiator hose and thermostat from the engine. Remove the cap from the plastic recovery tank. Fill the cooling system by pouring coolant into the thermostat housing on the engine. Once it's full put the thermostat, thermostat housing, and the upper radiator hose back on. Start the engine and let it warm up. If the coolant level in the plastic recovery tank goes down top it off as needed until it stops going down. Hope that helps! Jim