Question about 1995 Chevrolet Tahoe

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1995 Chevy Tahoe 4x4 4dr 350

I've replaced several thermostats recently, but my temperature gauge still goes up to over heat and then almost (as if the thermostat is finally opening) goes back to 190 (where it should be). This scenario just keeps repeating over and over. Speed doesn't seem to have an effect, however at Idle it is less frequent. The truck never does overheat and from the engine compatment standpoint, all seems fine. It would appear there is something (module...regulator) not functioning properly.

Thanks Ya'all

Tony

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  • Kim Gallagher Dec 15, 2008

    I have the same problem - did this fix your problem?

  • Travis Quick Jan 21, 2009

    I almost have he same problem, when i start my 97 tahoe, it seems fine, but then i drive it for not even 15 min it go's way way past the red mark. and it causes this bad smell but not really a burning smell. and then when it go's past the red line of the temp gauge, it will start making this clicking noise under the hood.and im just afraid its gonna blow...

  • PozTonyPhoen Jan 29, 2009

    I did run the engine with no thermostat. It ran just fine...cool, but fine. I flushed the entire system out with water and then replaced ALL of the coolant with new and ANOTHER new thermostat. Everything seems to be working fine now. I either had a rash of bad thermostats or the coolant (3 years old) was causing the problem with the thermostats. Regardless....it's all good now. The key really is to run the system without a thermostat. Thanks to

    Alicantecoli for the suggestion.

  • fantsipants Jan 30, 2009

    I've got the same problem on my 1996 tahoe, just replaced the thermostat and it keeps going up to near redline but then backing off, I am getting some hissing from under the engine, and my heat isn't working!

  • Anonymous Mar 25, 2014

    needle goes into redzone,car overheats. changed thermostat,fan,cap,sensor. no one seems to find the problem. one mechanic said he had idling for 30 min. was fine. why isnt it fine for me. their overlooking something,what else can it be. hose was also checked

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There is no fan control switch, the engine coolant fan is mechanical not electrical. If you can remove the thermostat and run the engine and you have plenty of coolant the supply hose to the water pump may be collapsing or a small hole may be present allowing the pump to air lock. If the hoses are fine the pump could be bad. Is your heater heating? The answer to this question will lead you to the solution

Posted on Jan 29, 2009

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Try it with no thermostat if its still the same only later then try changing the sensor unit.racking my one brain cell here had a problem like this on a seat ,and it was the fan cut in switch its first run it wouldnt cut in then afterwards it was fine all day ,thermostatic coupling switch is the technical term to you me its the switch in the radiator that puts the fan on.

Posted on Nov 13, 2008

  • kyletinneyy Feb 20, 2011

    i have a 1996 chevy tahoe and it started overheating out of know where i changed the thermistat and it still over heats i checked my water pump its not leaking or making noises the belts are good it has water and coolent but i started it with the radiotor cap off and the fluid isnt going through it just sits the comes out and my raideator hose is realy hard to squez plzzzzzz help

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