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  • More Power's Avatar
    01-15-2026, 12:29
    More Power replied to a thread coolant leak in Duramax 6600
    The oil cooler in these trucks have leaked coolant when subjected to cooling system over-pressure, like due to a bad head gasket. Gasket/seals...
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    12 replies | 899 view(s)
  • More Power's Avatar
    01-15-2026, 11:10
    More Power replied to a thread coolant "complete" drain.. in Duramax 6600
    A couple of the block drain plugs are inaccessible without more disassembly (i.e. remove starter on passenger side or other stuff on driver's side)....
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    8 replies | 283 view(s)
  • JohnC's Avatar
    01-15-2026, 06:26
    JohnC replied to a thread coolant leak in Duramax 6600
    When the model year change happened in late 2005 GM was running an "employee pricing for all" promotion. Coincidentally, when it ended the "real"...
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    12 replies | 899 view(s)
  • DmaxMaverick's Avatar
    01-14-2026, 23:34
    DmaxMaverick replied to a thread coolant leak in Duramax 6600
    Also, your VIN 8th digit should be either 2 or D, for 2006. 2 is early, D is late. (I have no idea what is E) They are essentially the same...
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    12 replies | 899 view(s)
  • spongebob's Avatar
    01-14-2026, 17:13
    spongebob replied to a thread coolant leak in Duramax 6600
    thxs DmaxMaverick
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    12 replies | 899 view(s)
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