How do I replace a thermostat on a dodge ram 1500 truck

. Drain radiator to level below the thermostat.

. Remove both bolts securing the thermostat housing.

. Separate housing, remove seal, and remove old thermostat.

. Install new thermostat and seal in the same position as the old one. If it has a pin, it should face upwards.

. Install bolts, tighten everything up, and refill with coolant.

. Check for leaks.