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Travel_glampers's avatar
Travel_glampers
Explorer
Feb 06, 2020

2009 Silverado 3500 HD Duramax LMM overheating

I have the above truck towing a 14,000 pound fifth wheel. When the truck was new, it overheated going up to Eisenhower Tunnel (11.000+ feet) in June. Both the engine and transmission (Allison) tempe...
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Grit_dog's avatar
Grit_dog
Navigator II
Feb 07, 2020
Interesting thread....
So you make an annual trip west but don’t hit the mountains, but now since you’re going back to (different) mountains you think it may overheat again?

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