How do you charge my cadillic ac with r134a?

if your trying to recharge your ac on a 1994 thru 2000 Cadillac 4.9 and the comprsser wont turn on due the the low level dissconnect your battery and take the positive lead and touch it to the ground of the battery (this will reset your computer) hook up your recharge kit and start the car put the ac. on the coldest setting and shake the can up and down this makes it charge faster. but be aware make sure your charging kit has a gage if the gage goes into the red disconnect and stand away from the car theres a clog in your ling or somthings not right shut off the car and bring it to a repair shop and let them do it