I think all our trucks take a long time to warm up. I live in the Northeast and from a cold start it takes about 5 miles for the needle to move. My other cars warm up a lot quicker.
Maker sure your fan clutch is operating ok. I don't think a thermostat will help unless yours is stuck wide open.
Maker sure your fan clutch is operating ok. I don't think a thermostat will help unless yours is stuck wide open.