What valve do you put freon in for a 1998 Chevy prism?

The 1998 Chevy Prism uses a low-pressure port for adding refrigerant (Freon). This port is usually a smaller diameter than the high-pressure port and is often colored blue. It's critically important to use the low-pressure port; adding refrigerant to the high-pressure port can severely damage the A/C system.

However, I strongly advise against attempting to recharge your car's A/C system yourself. Refrigerant handling requires specialized equipment and knowledge to ensure proper charging and avoid injury. Improperly adding refrigerant can lead to system damage, personal injury from escaping refrigerant, and environmental harm.

It's best to take your 1998 Chevy Prism to a qualified automotive technician for A/C service. They have the proper tools, training, and equipment to diagnose and repair your system safely and effectively.