How do you recharge air conditioning on 1998 Chevy lumina?

Well, honey, first off, you're gonna need to locate the low-pressure port on the AC system, usually found near the firewall. Then, you'll need to connect a refrigerant gauge and a can of R134a refrigerant to the port. Start the car, turn the AC on high, and slowly add refrigerant until the gauge reads in the correct range. Just be sure to follow the instructions on the can and wear some gloves, unless you want frostbite on your hands.