car overheating

You may have a clogged radiator, those radiators typically get loaded up with debris in the lower tubes, so feel the radiator core with your hands (carefully so as to avoid burns or injury) and see if the lower area is cooler than the top area. If so, it may be clogged and not able to cool the engine at cruising speed. If you want to find a specialist, here's a directory link for you: https://repairpal.com/geo-repair-in-longview-washington