Q: Is there any truth to the rumors we're hearing about aluminum cylinder head and head gasket failures?
A: While we expect that sometime - somewhere a Duramax head and/or head gasket will fail, as of September 7, 2001, GM Powertrain reports that there have been NO confirmed head/gasket failures in any Duramax 6600 engine produced since start of production in July 2000. Further, among the thousands of Duramax 6600 owners who participate in TheDieselPage.com's online bulletin board forum, none have reported any head/gasket failures. So, no, there is absolutely no truth to the plethora of head/gasket rumors.
The engine itself is built in Ohio.
Egon