2000 Chevrolet S10 pickup truck 2.2l non flex. Found a pinhole leak in the AC discharge hose right off the compressor. Scared the daylights out of me due to my knowledge of how much pressure is there. I don't know the compressor is messed up too but I know that hose has to be replaced. Compressor won't turn on and I checked it with the gauges and read zero pressure in the system. All I did was move it out of the way temporarily to replace another pump underneath it. Is it okay to replace just the hose and the dryer assuming I find no leak on anything else? Do I need to replace everything else connected after having the refrigerant discharged including even the evaporator which I really hope I don't have to deal with because it's buried? What parts do I need to be most concerned about replacing?
If it was working before you should be OK replacing the bad hose and the drier. (The low-pressure cutoff protects the compressor from damage when too much refrigerant leaks out.) Given the age of the vehicle check other hoses, they may need replacement as well.
Also don't forget to add a little PAG oil of the correct viscosity to make up for what's lost in replacing the hose and drier. I think the general rule of thumb is 1 ounce for the drier, and 1 ounce for hoses but there should be a factory spec for your vehicle. Maybe put in some UV dye as well to make finding future leaks easier.
https://ricksfreeautorepairadvice.com/how-much-oil-to-add-to-ac/