Well, for those interested, I went into the shop this morning to have my A/C checked out. After my tech checked everything out, he thought the A/C output was lame as well. He evacuated the entire system, then refilled it. Same output as before (right at 49 degrees). He then went on the GM tech website and got the specs for my truck (see pictures below). Apparently these are designed to run at only 50 degrees output or thereabouts. We theorized if it was a capacity issue (these trucks only hold 1.7lbs of refrigerant) or if it was simply the fact that the e-fans don't spin up enough to exchange the heat properly. Either way, both my tech and the service writer encouraged that myself and anyone else who thinks this isn't cold enough to write GM customer care and perhaps they'll update the calibration for these systems. At any rate, save yourself the trip for now if your Air Conditioning is right at 49 or 50 degrees. That's all it's capable of doing.