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Jakessweetthing's avatar
Jakessweetthing
Explorer
Mar 05, 2018

2007 Chevy Silverado HD Duramax,Diesel Allison Transmission

We have a 2007 Chevy Silverado HD Duramax Diesel with an Allison transmission, that now has 200,000 miles on it. 85% of those are over the road miles. We have had it serviced and taken excellent care ...
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vjstangelo's avatar
vjstangelo
Explorer
Mar 08, 2018
Agree with other posters, the overheating is a concern. I know the GM gassers are known to have gasket problems. If it is a head gasket, it could be allowing air into the cooling loop which would cause air pockets in the loop. It wouldn’t overheat all the time, but would get progressively worse as the leak becomes more pronounced. Do the Duramaxers also have a problem with gaskets? I

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