Recharging the air conditioning system in a 2013 GMC Terrain is a relatively simple process that can be completed in about 30 minutes. The most important thing is to make sure that you have the right tools and materials for the job. You will need a refrigerant recharge kit, which can be purchased at most auto parts stores. You will also need a set of wrenches and a screwdriver.
Once you have the necessary tools and materials, you can begin the recharging process. The first step is to locate the low-pressure service port on the air conditioning system. This port is usually located on the passenger side of the engine compartment, near the firewall. Once you have located the low-pressure service port, attach the refrigerant recharge kit to the port and open the valve. The refrigerant will begin to flow into the system.