It is possible the air compressor is bad. You will need to replace the air compressor, so the air will work again.
Probably low on freon.
Aprox 12 qts, it varies if you have ac or not.
The high speed relay switch may be faulty.
It wont work for AC measurements. Not designed for AC application
It wont work for AC measurements. Not designed for AC application
Could be low or over charged with refrigerant.
try first with freon
the lowside port would be located on passenger side up near firewall the will be your ac canaster as it will have the port right on it
you have an AC leak
A blown fuse is the most common cause for the 1996 Chevrolet Blazer sheet and air conditioning not working. The fuse box can be found in the engine compartment.
R134a
no such thing