WE CANNOT GET THE AC WORKING HOW DO WE DO IT? on 1991 Buick Park Avenue

THE CONPUESS ITS WILL NOT INGUE WHEN IT DO INGUE IT DISINGUE RIGHTAWAY

2 answers
If the AC compressor is coming on and going off, Then your probably low on Freon and will need a shop to service your AC unit, You can locate a shop near you here www.repairpal.com/directory and you can check AC recharge prices here www.repairpal.com/estimator
Low refrigerant level. Have the system leak checked. Then an evacuation and recharge. $$$$