Teaching myself how to service automotive A/C so I can fix the system on my OBS 

Another great video Mr.Blake I’ve been watching all of the OBS progress and Mann I cnt wait to start working on mine I just bought a 1997 c1500 extended and we all appreciate you

Pretty good vid for your first AC job. AC work is a learning curve but I'm afraid 4 cans is way to much, not much takes 4 cans any more unless you got a school bus with rear air. One helpful tip, you can google it and it will tell you how much freon it should take and how much oil and what kind to put in when replacing parts such as compressor, condenser ect. Also there should be a high pressure fitting in there some where, it is important that you know what high your high side pressure is. High side pressure should be around 200-250 if gets higher then that and closer to 300 shut it off and find out what's wrong. If your sniffer doesn't find a leak with 4 cans you probably don't have a leak. 29 is about the best vacuum you're gonna get if it holds that for 15-20 min. you're good. Before you pull the dash apart find the drain hose in the fire wall where water drains out and put your sniffer in the hose if it doesn't go off your evap is probably ok, if it does go off you found your leak. Hope this helps.

Great video man! That truck looks like it's in excellent shape for being 35 years old! Back in the day we had a 1992 Chevy Silverado, eventually sold it, have a 1998 now, just something I use now and then, your truck looks really nice interior, paint even the engine. I'll be doing my AC soon probably as well on my 1998, which doesn't look nearly as nice as your truck, of course my truck hasn't been parked in a garage for probably 20 years and don't use it a lot, probably why the AC acts up on it. Did you just go to a mechanic and they pulled your freon out? How much did that run you? I want to do as much as I can myself rather than taking it in to have a shop full service the AC as they will probably just go replacing everything when it just needs cleaned out and filled up, but if I could get it cleared out then I could test it and fill it up like with a kit like you have there, it looks like something I could do easily enough. 👍