Rudolfo,<P> All vehicles regardless of make will get hot when climbing long slops and hills. There are some things you can do to slow the process. Add a product called water wetter from Redline Racing. It is available on line at performance race stores. Change the thermostat in the cooling system to one that opens at a lower temperature (170C ). Do not use the air conditioning when climbing hills. your truck won't warm up that fast inside. If it is still doing the near to overheat after making htese few modifications get your cooling system checked by a professional. I have a few other suggestions but I do not know your mechanical skills so I am not sure if I should suggest them.<P>Gord