How to Recharge GMC Yukon XL Air Conditioner Refrigerantby Jeremy Holt
All vehicles manufactured after 1995 use environmentally friendly R-134a refrigerant to keep the inside of the car and its occupants cool. Freon gas was commonly used before this date but no longer since the Environmental Protection Agency restricted its use. Occasionally, the refrigerant needs to be recharged. This is something anyone can do at home.
Start the Yukon's engine; turn the air conditioner on, and open the windows -- the recharge process requires that the air conditioning compressor is running.
Raise the hood of the Yukon. In the rear passenger side of the engine compartment, locate a canister wrapped in silver insulation; a little larger than a soda can. This is the air conditioning accumulator. Above the accumulator there's a silver pipe with a black dust cap on it marked with an "L." This is the recharge port. Remove the dust cap.
Place the refrigerant can on a solid surface. Place the valve fitting from the recharge kit on top of the can, then turn the valve handle to draw out the valve stem until it pierces the can. Leave the handle on top of the can in this position.
Place the valve at the other end of the recharge hose onto the Yukon's recharge port; the fittings are similar to those you would use to inflate your tire at a gas station.
Turn the handle on the recharge kit counterclockwise a little until you hear the rush of the refrigerant flowing into the recharge port. Hold the valve on the port until the flow stops, then remove the valve from the port, and replace the dust cap.
Place the empty can onto a solid surface, and unscrew the valve to remove it.
- close Use only one can of refrigerant to avoid over-filling the system.