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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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FishOnOne's avatar
FishOnOne
Nomad
Feb 07, 2020
Travel glampers wrote:
Thanks for the info you all,

I'll be heading back to CO in June (San Juan Mts.).

Do you know what changes GM made?


GM's overheat issues was with 05 models only. You should be good.

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