Charge a/c
 

I have a 2006 HHR 2.4 L I think my ac has air in the system. I cannot read the ac sticker on the car. Can anyone tell me how much R 134a I am supposed to have?
I am getting ready to vacuum it out.

Only way to get "air" in the system is for all the freon pressure to leak down. You may want to rethink your diagnosis.
Hook up some gauges. If there's any pressure, then "air" hasn't entered the system.

FYI. Charge is .41 kg or .9 lb (per the sticker on my 2010)

Ac
 

Thank you that makes sense. I have been looking all over the place. I am about ready to give up and take it to a pro. I have gotten confused with the symptoms. It does not cool except at idle in the yard with gages hooked up. It doe not cycle on and off. But if I turn it off the clutch will go off and back on when I turn it back on. When static the pressure will bleed down to equal. I may have it over pressure now.

Why don't you post your readings.

Ac
 

I will tomorrow. Thanks.

Why do you think it should cycle on/off? The only thing that would make it cycle is either over or under pressure.

Maybe the clutch is slipping or the belt is slipping?

Ac
 

I don't believe anything is slipping.

Those sound like classic over pressurized issues.

Ac
 

That's what I think also.

Why? There are no high and low pressures shown.
Find out before you overthink the wheel.
K.I.S.S.