No AC systems have drain plugs. You do have two valves a low side and high side valve. To vacuum the system you have to evacuate the system first. Then attach a Manifold AC service gauge set to the valves and use a vacuum pump. This really should be done by someone who is familiar with AC service.
get a chiltons book from the parts store
schematic of 1998 chevy lumina ltz 3.8l air conditioner
You need a vacuum pump designed for that purpose.
my chevy blazer 1984 the air conditioner blows from down side only.
air conditioner for1994 Chevy Beretta not working is there a senor that could be bad. system is charged.
cant by pass the alarm system...
it sucks
The 1981 Chevrolet Camaro air conditioning system has a Freon capacity of 5.3 pounds. The Freon that was originally used in the 1981 Chevy Camaro is no longer available.
12 volt electical system
How to bypass security system on 1990 Chevy camaro
SS.
chevy camaro