A clutch fan that engages at too low a temperature with a sumultaneous failure of a dash gauge suddenly reading too low is a bit hard to swallow. This thing needs diagnosis - not a politically liberal "shovel money at it" fix.
Shoot the cylinder head, thermostat housing and water pump suction side of the radiator. No guesswork. Definitive troubleshooting and accurate fix.
If you lust to spend money do it intelligently and get the cooling system pressure tested on the way home from Harbor Freight were you bought your new Infrared Thermometer Gun. After the system gets fully warmed up paint the gun across the full extent of your radiator core. Cooler spots mean a radiator job is in your near future. Then check your tire heat then the calibration on your rig's thermostat. Shhot the DWs forehead and see if she is ready for a Martini.
