SOURCE: how do you drain the coolant out of a 2002 yukon
Usually there is a petcock on the lower edge of the radiator either on the right or left side. If you can not find it at all then disconnect lower radiator hose from either radiator or water pump. This will make a small mess but will drain the coolant.
SOURCE: code p2120 and P2125 on GMC Yukon 5.3 2006 with
OBD-II code P2120
What does it mean?
Throttle/Pedal Position Sensor/Switch "D" Circuit
Poooooooooo2125
ThrottlP2125
ThrP2125
Throttle/Pedal Position Sensor/Switch "E"ottle/Pedal Position Sensor/Switch "E"e/Pedal Position Sensor/Switch "E"
SOURCE: 2006 yukon ac drain tube
That is not anything to be concerned about, it is just water from the AC core condensation, the blower fan air pressure forces it out the tube when you start it. What would be a problem is if the drain was clogged..
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