Park on a flat surface, set the parking brake, and loosen the lug nuts
Jack up the vehicle and remove the wheel
Deflate the tire completely
Break the tire bead away from the rim on the valve stem side
Remove the valve stem cap and valve core
Pull the old valve stem out of the rim with a valve stem tool or pliers
Clean the valve stem hole in the rim
Lubricate the new valve stem with tire lubricant or soapy water
Insert the new valve stem through the rim hole
Pull the valve stem into place until it seats fully
Reinstall the valve core
Inflate the tire to seat the bead
Check for leaks around the valve stem with soapy water
Reinstall the wheel on the vehicle
Tighten the lug nuts
Lower the vehicle
Torque the lug nuts to specification
Recheck tire pressure after installation