My fan blade isn't turning real fast put new thermostat in i don't know its getting really hot?
If your truck is getting too hot, then there are several things that could be the cause1You addressed the first item which would be the thermostat2Now you say that the fan isn't turning very fastThat could be an indication that your fan clutch is brokenSo try changing the fan clutch3The radiator my be clogged and may needed flushing or even rodding out4The water pump may be bad and need to be replacedSo one-by-one you have to eliminate these possible problemsMy money is on the table betting on the fan clutch as the culpritIt's that round aluminum thing that has little fins on it that your fan blade is attached toIt's best to get a new one rather than a junk yard special since the junk yard one may also be defectiveIt has a little thermo-coil on it and if it breaks, then it won't work anymore.
