You can't see a vacuum, a vacuum is a process.
A vacuum diagram for a 1995 Chevy S10 Blazer 4.3 will show the various vacuum hoses and components connected to the engine. It typically includes labels for each hose and component, indicating their functions and the connection points. The diagram is used for diagnosing and troubleshooting issues related to the vacuum system of the vehicle.
Look at the odometer, it will tell you what mileage it has.
look under the battery tray
If you look under the hood you will see a sticker with all the vacuum lines on it.
* == 1st generation vacuum tube look like as a parallel electric bulb. _____ ----_____)
Look on the carb for a small vacuum source above the throttle body. You would want one that has no vacuum at idle.
If you have power brakes look where the large hose that goes to the brake booster connects to the engine and that is your main vacuum source.
The AC vacuum control valve on a 2005 Chevy Classic is located on top of the AC pump. Look for a small pipe that is shaped like an "L", that plugs into the AC pump.
sounds like a head gasket. pull the oil dipstick and look for bubbles or a milky discoloration in the oil
That would depend on the application as there are many uses and shapes and specifications for a vacuum breaker
It didn't look like anything as they didn't make a 1992 GTO.
If you open the hood up and look around at all the stickers that are across the top of the radiator shroud, You will see one with the vacuum hose diagram on it.