Why is my 1999 Yukon running out of coolant?
Why is my 1999 Yukon running out of coolant? If the air stays cool for the entire time while the air conditioning unit is running, you more than likely just ran out of coolant. Monitor the air conditioning on the 1999 Yukon for the next few months. If the air conditioning unit stops releasing cold air after only a few weeks or months of use, there is a leak. Where is the air conditioning on a GMC Yukon? Twist the nozzle's top to release a small amount of air and close it after a second. This will clear the hose...