Where is orifice tube on 98 Cadillac STS?

The orifice tube on a 1998 Cadillac STS is located in the liquid line of the air conditioning system, typically between the condenser and the evaporator. To access it, you may need to remove the front grille or other components to reach the AC lines. It's usually a small, cylindrical component inserted into the line. Always consult a repair manual for detailed instructions specific to your vehicle.