replaced compressor flushed the lines new accumulator and orifice filter added 2 cans r134 still not cold gage is reading about 50 psi
Air not cold on 1990 Chevrolet Suburban 1500
2 cans of 134a does not sound like enough charge for the a/c system on your Suburban. There is usually a label under the hood stating the charge amount - often found on the top of the accumulator which you have just replaced. If you have rear a/c that will require more refrigerant that front a/c only. You will need to find out what the proper "charge" amount for you a/c system is. Once the refrigerant level is correct then you can check the system performance.
1 more answer
did you vaccum the system to remove air before you charged? If not it could be reading 50 psi because air is trapped in the system along with the 134a.