I finally figured it out on my own. Apparently there are two separate heater cores, a front and a rear. This I did not know until this morning when I went to flush the core. The front core was plugged with residue and the rear was eventually getting to the same point. I flushed both cores and I am producing good heat both front and rear.
The heater core is good, I believe, since the rear is producing heat. Could I have a bad actuator? And if so, how can I diagnose that?
2006 GMC Yukon SLE 4WD
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Maintenance & Repair
I am having trouble with my ac in 2005 GMC Yukon. The air just quit blowing out cold air. It still blows, just not cold. When I push the ac button, the motor does even drag a little like it used to wh...
2005 GMC Yukon
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Maintenance & Repair
2002 GMC Denali ac quit blowing cold air in rear control unit 2 years ago and now this year the front quit blowing cold this year. Comprssor kicks in and stays on it does not cycle like its low on ...
2002 GMC Yukon Denali AWD
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Maintenance & Repair
I have no brakes what so ever until my foot is completely down
2003 GMC Yukon SLE 4WD
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Maintenance & Repair
The auxiliary power outlets in my 2006 GMC Yukon Denali are not providing power to phone chargers or lighter. What can I do to get them working again?
2006 GMC Yukon Denali AWD
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Maintenance & Repair
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