2005 Chevy Silverado Overheating warning comes on....

2005 CHEVROLET SILVERADO
125,000 MILES • V8 • 2WD • AUTOMATIC
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DVIDOR88
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Truck is full of Dex...when the engine runs, it seems to be make a high pitch whine.

The overheating warning light comes on. Is this a thermostat issue or water pump?
Jun 5, 2010 at 11:26 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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