Hello GM Truck Club Forum: I'm hoping someone can help me with this. I bought an a/c kit and am replacing everything right now. I can't find the orifice tube... I've traced the high-pressure line all the way to the firewall, and am now looking under the dash. have the glove box off and am taking lots of little screws out of the housing that holds the evaporator... does anyone know, is it in there somewhere? Or, is there any chance there isn't one? I didn't see a place for it post condenser. Thanks! I'll check back in a little bit - going back out to the garage. Hope I don't break something!