Engine Cooling problem
1999 GMC Yukon V8 Four Wheel Drive Automatic 165K miles
For a week now the temp guage on my truck's display has been fluctuating suddenly and spontaneously. The cabin heater also stops blowing HOT air when the guage goes to max.
I checked: coolant level - good. Upper radiator hose - warm/hot with good pressure. Hose to heater core - warm/hot.
Any thoughts as to what is causing this?
Have a great day!
Wednesday, November 18th, 2009 AT 9:00 PM