If your coolant has been in your truck for 3 years or about 75k miles you should consider doing a coolant flush and new thermostat. Then you might check your A/C pressures and top off the freon. Double check all your fluids axles, transmission and transfer case (if applicable). Brake fluid is another that needs to be changed every 30k miles as so does power steering fluid.
Hey gang... Just a general tech tip.
If your coolant has been in your truck for 3 years or about 75k miles you should consider doing a coolant flush and new thermostat. Then you might check your A/C pressures and top off the freon. Double check all your fluids axles, transmission and transfer case (if applicable). Brake fluid is another that needs to be changed every 30k miles as so does power steering fluid.