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This info is helpful for many makes and models. But I am working on my 1990 Chevrolet C K 1500 Truck. GMC GM Cars and Trucks all use this. Here is the full playlist. Lots of useful info here    • HVAC Air Conditioning Project Many Ca...  

See more videos about this truck    • Chevrolet Chevy C1500 / K1500 Repair ...  

I don't have a part number for the pressure switch. You will have to search like i did and just find it. Sorry.

Info on how to install an R4 style automotive AC Delco GM Chevrolet HVAC AC A/C air conditioning compressor, including the washers and inserts. I am no expert. This is just what i learned from a couple of weeks of googling and whatnot. And I found so little info on YouTube or online. That is why I made this video. Hopefully it will help someone. I MIGHT be able to help you if you have questions. But I am definitely no expert. I just did this one huge project. lol


Where to buy
Vacuum system kit https://amzn.to/33Rowfk
R4 Compressor Sealing Washer Set and Inserts https://amzn.to/3kCwlLF
Nylog Blue https://amzn.to/3iwjCZb
A/C Power Clean & Flush https://amzn.to/30Nx6Kd
90-Degree Circlip Pliers https://amzn.to/2Ci1jHJ
AC Delco Refrigerant Oil https://amzn.to/2XR6oOS
AC Delco Orifice Tube (make sure this is correct for your application) https://amzn.to/2DZsZl5
Universal AC System O-Ring Kit https://amzn.to/33RbL4k


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