Refill freon on a chevy suburban 2500 4x4...

if it is cooling just alittle bit ,try one can if you can get any gauges to hook up to it, if its not cooloing at all ,get one big can at auto zone , tall can with oil and stop leak in it with freon in it, try the big can ,will work for you ,hope to help you, if it gets over filled ,the system will not circulated ,not cool, really need to hook gauges to it, thanks robert b.