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GMC Forum: Transmission temperature...
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Old 04-22-2012, 08:42 PM
davidvc davidvc is offline
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Default Transmission temperature...

I have a 2008 Yukon 5.3L V8 3.73 (w/HD tow package and auxiliary transmission cooler) that I tow a 23' travel trailer with. The trailer weighs about 5300 lbs fully loaded. I noticed that when I'm pulling the trailer up hills/grades that my transmission temperature increases to around 230 degrees. I also notice that my cooling system temp increases as well (usually to around the same temp). Trying to find out if this is normal or if anyone else has experienced this?
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