Air conditioner not working?

New rear evaporater. The nut on the big line was messed up. Went to parts store to have new end put on. The new end would only screw on about 2 turns. The threads both look the same. Possible they are different threads or is this common that it would be this tight because the aluminum is so soft.

Hello, I have a 1999 GMC Yukon SLT. I've been noticing for a while now, that when I cut my heater or A/C on it doesn't blow through the vents on the dash. But it blows underneath the dash onto the feet in order for me to cool down or heat up the inside faster I have to use the rear passenger vents. Any idea what could be the issue? All of the lights and stuff work, it's just the front dash vents blow.

My a/c compressor pulley is freezing up. If I get a smaller belt can I bypass that pulley as a temp fix until i'm able to get a new one?

Well at this moment I can't afford to buy any kind of pulley whether it's the a/c compressor pulley or the one that you're talking about. I was just wondering if I can just get a smaller belt and completely bypass the a/c compressor even if that means not being able to run my a/c. I'm in a desperate attempt for a quick fix because I can't afford to lose my job because I don't have transportation. Will the smaller belt bypassing the ac compressor fix the problem for now? Thanks you so much for your time and advice.

I'm replacing the A/C hose assembly on a 1997 GMC Yukon without rear A/C. The old part has three ports that come out above the compressor. High pressure, Low pressure, and some electrical port that plugs into a wire assembly. The new part I recieved form the auto parts store has the three ports, but the one where the electrical component should be is just a regular port similar to the high and low ports, only without a cap. The hose assembly for the model with rear A/C has the electrical component I need, but it also has an extra hose that I don't. Removing the electrical portion I need for the old part does not look like an option as it appears to be welded or pressed on. How should I proceed? Is there an adapter part required or is the electrical portion even necessary? Please help. Thanks.

Roy,
The hose they gave me is correct except it's missing an electrical connection at one of the ports on the housing that attaches onto the compressor. I think it's a sensor or a switch, but I'm not sure. It has a port similar to one you would plug a compressed air hose onto rather than an electrical housing for an electrical connector. The images below are the hose with and without rear a/c. The one with rear a/c has the electrical connection needed, but the extra hose that is not. I forgot to metnion that the engine is a replacement of the original so that may be a factor.