Question about 2000 GMC Sierra

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2000 gmc sierra 2500 the engine temp rises when stopped. It has a 6.0 V8 i also noticed the transmission temperature is going above 200degrees, thats never happened even hauling loads in texas heat

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  • akatrailertr Jul 02, 2009

    it has a fan clutch thereisnt any leaks anywhere and the waterpump is new and so is the thermostat. i replaced them two months ago now this. the truck has 200,000 miles on it and i checked the radiator and A/C fins theyre not plugged with debris.the fan is also spinning fine. it takes a while before my problem starts to occur. only at idle in traffic at stoplights. its fine when traveling or if i rev the motor. could this be a clogged radiator? i heard dexcool has it problems

  • Ronald Long May 11, 2010

    Does it have an electric fan or a clutch fan?



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Just guessing but, I'd say either fan clutch is going bad, not turning as fast as it should be once temps go up or if you have electric fans, either fans or relays bad. I'm leaning more toward the fan clutch. The fins on the impeller of the waterpump can also wear done over time and reduce the amount of water flow.You may also want to make sure the fins in the radiator are clean and not stopping air flow. I'm assuming that when you're moving there's no problem so that should say that water pump, thermostat are doing good. Please rate this. Thanks

Posted on Jul 02, 2009


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