Refill freon on a chevy suburban 2500 4x4 2001 i dont know how much to put on it

You need to take out the bolts holding the cover on but leave 2 in it one on eather side then pop it open with a flat head screw driver make sure u got an oil pan under it first . Then replace your gasket and put the cover back on, as for filling it there is a bolt on the front side of the axle and its usually a square hole that a 3/8 drive rachet will fit in u stick the rachet in it and take it out. Then you fill it up with the suggested gear oil and the specified amount.

a low freon charge will shut the compressor off

You mean a wiring diagram? Blower problem or Compressor doesn't come on? Is it full of freon? Does the compressor come on if you jump the low pressure switch?

Take them off with line wrenches you you see how long they are and go get new.

most of the time this wont be the case ,,,this has a ht6 compressor,bad to leak,,look for low freon levle and check low presure switch and high presure switch and connector,high side switch is on back of compressor,check to see if bad connector or bad switch/these are in series with one another ,before clutch activation

134a

Sounds like your a/c compressor is dieing,sometimes they need oil with the freon.

Its a leak ...probably concealed like in an evap housing or rear air unit and lines (if it has that). Prob at this juncture I would remove all the freon and bring system into a vaccuum with a pump and see if it will hold vaccum for an extended period of time. A bad leak will not hold srong vacuum very long and much cheaper than wasting expensive and enviromental un0friendly refrigerants.

your system needs to be cleaned out and converted to r134 or you can try a r12 substitute

if i am not mistaken it uses the same reservoir as your windshield washers. if its not working it may be plugged or malfunctioning.