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Message: <blockquote data-quote="INW-Iron-Steel" data-source="post: 23673" data-attributes="member: 11733">I pulled the driver blend door (temperature) actuator. The luck was good on this one, as that actuator is by far the easiest one to get at. I was going to slap an old actuator I had pulled out of the 93 burb in if it was the same. One of the levers for the mode had popped out of place on that rig. I figured it was the actuator acting up so I had one on hand, and since it was out, I just installed the new one. Anyway, upon removing the one from the Sierra, I compared them and they are almost exactly the same EXCEPT for one pin on the wiring plug. I attached a picture of the two for comparison (Blue label one is from the 93).[ATTACH]3094[/ATTACH]Just a reminder to double check the pin-out on these when buying, or if you have a few laying around. Since I had it out I punched the OEM part number into rock auto and purchased a couple different brands of actuators, along with an AC kit (accumulator/orifice tube(s)/gaskets), and a blower motor resistor to hopefully get all fan speeds back. Now for the weird part. I put the old actuator pictured above back in the truck for the time being until new parts get here. Out of curiosity, I started it up and moved the temperature sliders, and wouldn't you know it, that driver temperature blend motor came back to life. I punched the AC button and out of amazement the clutch kicked on and all my vents got icy cold. It didn't build pressure on the high side only, it kept functioning as normal for more than 5 minutes. I guess all I needed to do was purchase the parts to fix my problem, but not actually install them... Huh, who knew it was that easy.On a serious note, I'll replace that actuator since it's on the fritz, and hopefully the resistor restores all fan speeds. As far as the AC, if I don't need to evacuate the system, repair, and re-charge, that would be a massive win. I guess only time will tell on that one. Gotta love old trucks and their quirks.</blockquote>