Recharge ac in 2002 GM van?

To recharge the AC in a 2002 GM van, first locate the low-pressure service port, typically found on the larger diameter aluminum line. Attach the refrigerant can's hose to the port and ensure the van is running with the AC set to maximum. Start adding refrigerant gradually while monitoring the pressure gauge, ensuring it stays within the recommended range. Once charged, detach the hose and check for proper cooling.