Question about 2001 Chevrolet Silverado

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The temperature gauge is almost in the red but the engine isn't overheating

When idling the temperature gauge goes back to normal but when you excellerate, it goes back to almost max.

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Check your fan clutch fo proper function. if you can free spin it its bad. or take something and try to stop it while its running at operating temperature, if you can easily stop it its bad. It should stop turning within 2 seconds of turning off the vehicle, if it doesnt its bad. Also suspect a bad water pump with worn out vanes. Sounds like you dont change your coolant regular, all of this is from lack of maintanance on the cooling system. also take a temperature differential from the inlet and outlet of the radiator, anything over 40 degrees and your radiator is stopped up. Themostat etc.....

Posted on Nov 19, 2011

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Posted on Jan 02, 2017

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The overheating and lack of cabin heat both point to a failed engine thermostat which would be stuck closed. At the warm up stage, the coolant stays in the engine block to bring the engine to efficient operating temperature, then it opens and circulates the coolant through the radiator and heat core. If the thermostat is stuck closed, the engine will overheat, and coolant will never reach the heater core, and you will not get cabin heat.

Blinking oil light at idle which goes away during driving could be a low oil level, but may also be a drop in oil pressue. You could have a clogged oil fliter (at best) pickup tube, or a failing oil pump.

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