Hello everyone, I just picked up a 99 GMC Suburban (K1500) and I am loving it. However, my air conditioning is not functioning and I am unable to find the issue. The previous owner had the A/C system serviced about two years ago and had a slew of things replaced in it so it was working at some point but it certainly isn't now. The issue (as seen in the video below), is that when the A/C is turned on, the compressor will activate and deactivate at a set interval leading me to believe there is an issue with the switch or something electrical. I already tried adding more refrigerant to the system but that didn't make a difference. I was searching around on this site (and others) and the only thing I found was that I possibly have a faulty pressure switch. What do you guys think? Anyway, this is my first Suburban and it's shaping up to be a really nice SUV for me. Can't wait to use it to tow my RX-7 to the track with it . Please help.