Question about 2005 Chevrolet Trailblazer Ext

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Trailblazer lt 05 overheating

I have a trailblazerLLT 2005 its overheating, i got the coil changed, radiater cleaned and reinstalled, one spark plug changed. still the temperature reaches 125 at 30 kms of driving at 110 kmph.
please advice.

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  • drsarfarazkh Feb 04, 2009

    no I didnt change the thermostat, bcoz one mech changed coil, other one was changing radiator which i refused at the last moment, ultimately cleaned and after checking air water leaks reinstalled . problem continues. engine noise increased and temp reaching max in 20- 30 kms,

  • Richard Delahant May 11, 2010

    Did you change the thermostat?



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Overheating has a few possibilities.
low volume from water pump.
air lock caused by a small leak
cooling fan not coming on. from radiator fan switch or relays.

have the system pressure tested,
check the fan operation,electric or clutch fan.

Posted on May 13, 2009


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