Question about 2002 Hummer H1

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Temp. rises quick

Motor gets hot temp. gauge moes quickly to red zone within 30 minutes of driving.

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Most likely the thermostat is stuck shut. Or the cooling fans do not work.

Posted on Feb 12, 2009

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Might wanna grab the service manual. I bought mine for my 2002 on ebay on cdrom. Just search Hummer Repair Manual and you'll find one. It is the only way to go and will save you hours of time and 1000s of dollars. Anyway just my two cent. Good luck with your hum hum.

Posted on Nov 09, 2008

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Is your coolant level normal? If so, is your coolant boiling over quickly?

Posted on Aug 15, 2008

  • Rob Ristin Aug 16, 2008



    I'd guess that your thermostat isn't opening, but will need a bit more info to make a better diagnosis.



    -R

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Probably a cooling fan issue or maybe a stuck thermostat.. change thermostat and check that cooling fans engage..good luck...also when you fill up the resorvoir let it be for a while and check to see if level is down, sometimes it takes a while for water to seep into radiator, i assume you dont have a radiator cap?

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