Freon for a 2002 Chevy S-10?

The 2002 Chevy S-10 uses R-134a refrigerant. However, do not attempt to recharge your A/C system yourself unless you have the proper equipment and training. Improper handling of refrigerants can be dangerous. It's best to take your vehicle to a qualified mechanic or A/C specialist for diagnosis and repair. They will be able to identify the problem, evacuate the old refrigerant (which is usually necessary), and recharge the system with the correct amount of R-134a.