Cooling problem - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

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Old 03-25-2011, 07:46 AM   eBay Motors  #1 (permalink)
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Cooling problem

Hello . I have a 03 G.M.C . 2500HD with the Duramax . When Im running down the road at a normal speed the temp runs about 190 . When I start climbing a hill with it it will go up to 210 . It never overheats and very quickly cools back down after leveling out . I've changed Thermostats but it still happens . Not sure where to start . Any help would be great . Thank you .
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Old 03-25-2011, 07:51 AM   eBay Motors  #2 (permalink)
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nymax - 190F to 210F is the normal operating range... keep on truck'n!
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Old 03-25-2011, 07:56 AM   eBay Motors  #3 (permalink)
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yup thats normal.. plus your temp gauge is more than likely off by like 5-10 degrees anyway.
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Old 03-25-2011, 08:13 AM   eBay Motors  #4 (permalink)
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I've owned the truck for 3 years now and it never wavered this quickly before . Even towing my loaded trailer . Its jumping fast . Im headed to Florida to pick up a 38 oldsmobile and am worried about overheating . It doesnt overheat It just heats up fast then drops quickly .
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Old 03-25-2011, 08:14 AM   eBay Motors  #5 (permalink)
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Normal, but you want to make sure the "Stack" is clean-- AC condenser, inner cooler, and radiator. It may be full if dirt, leaves and bugs. And hot weather is coming.
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