Where are the air conditioner high pressure and low valves on a 1995 Chevrolet blazer?

On a 1995 Chevrolet Blazer's A/C system, the high and low pressure valves (or ports, more accurately) are located on the drier/accumulator and the compressor respectively. They're not typically valves in the sense that you can manually open and close them like a faucet; instead, they are service ports with Schrader valves (like those on your car tires) allowing access for pressure readings and refrigerant charging.

* Low-pressure port: This is usually found on the drier/accumulator, which is a cylindrical component often near the front of the vehicle, usually on the passenger side of the engine compartment. Look for a larger, thicker line connected to it; this is the low-pressure line. The port will have a smaller fitting (usually capped).

* High-pressure port: This is located on the compressor itself. The compressor is a larger unit driven by a belt near the engine. The high-pressure port is typically on the side of the compressor, and will have a smaller fitting (usually capped) and a thinner, smaller line connected to it.

Important Note: It's crucial to locate these ports *visually* on your specific Blazer. Pictures or diagrams online specific to a 1995 Blazer's A/C system (possibly found through a repair manual or online auto parts store diagrams) will be immensely helpful to confirm. Working on an A/C system involves refrigerant under high pressure which can be dangerous if mishandled. If you aren't experienced with automotive A/C systems, it's highly recommended to take your Blazer to a qualified mechanic for any A/C work.