AC Issues

2000 blazer 4x4 4.3 with manual airconditioning. blows cool air but not cold.
Outside temp was 84 degrees. Idle pressures low side 40 high side 250. Where do I go from here?

Thanks
TCJimmy

Is the blend door swinging full hot to cold?
Good vacuum to heater controls?
Is air vents switching good floor defrost and dash?
Doe tempt change from full hot to cold or just stay the same?
Give us you low and high side readings at 2K rpm's with compressor running..
MT