1997 Chevy S-10 Orifice tube

The orifice tube, probably the most commonly used, can be found in most GM and Ford models. It is located in the inlet tube of the evaporator, or in the liquid line, somewhere between the outlet of the condenser and the inlet of the evaporator. This point can be found in a properly functioning system by locating the area between the outlet of the condenser and the inlet of the evaporator that suddenly makes the change from hot to cold. You should then see small dimples placed in the line that keep the orifice tube from moving. Most of the orifice tubes in use today measure approximately three inches in length and consist of a small brass tube, surrounded by plastic, and covered with a filter screen at each end. It is not uncommon for these tubes to become clogged with small debris. While inexpensive, usually between three to five dollars, the labor to replace one involves recovering the refrigerant, opening the system up, replacing the orifice tube, evacuating and then recharging.

The line you are looking for is under the accumulator near the firewall

See the picture below

Needing the orifice tube location for this truck..

First of all thank you so much for your donation.I emailed you the description and diagram of where it is it's call out 20 on the diagram.

Hi RodneyBest2378,Welcome to 2carpros and TY for the donation. Figure 49: Evaporator Tube

The plastic expansion tube is located in the evaporator inlet pipe.