Location of orifice tube on 1998 Chevy c k pickup truck?

The orifice tube on a 1998 Chevy C/K pickup's A/C system is typically located within the high-pressure side of the A/C system, close to the receiver/dryer. It's not easily accessible without removing some components. There's no single, universally-accessible spot; its exact location varies slightly depending on the specific engine and A/C system configuration.

To find it, you'll likely need to:

* Consult a repair manual: A Haynes or Chilton manual specific to your 1998 Chevy C/K pickup model and engine will have diagrams showing the A/C system's components and their locations. This is the best way to pinpoint it.

* Look near the receiver/dryer: The receiver/dryer is a cylindrical component often found near the firewall or along the A/C lines. The orifice tube is usually quite close.

* Follow the high-pressure A/C line: Trace the high-pressure line (it's usually thicker) from the compressor. The orifice tube is on this line, likely before it reaches the condenser.

Important Note: Working on an A/C system requires special care to avoid leaks and exposure to refrigerant. If you're not experienced with automotive A/C repair, it's best to take your truck to a qualified mechanic. Refrigerant is under high pressure and can cause serious injury if handled improperly.