Question about 2005 Chevrolet Silverado 3500

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2005 Duramax with Allison. Torque Converter stays locked up. What can cause this and how can I get it unlocked? Thanks for your help.

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There is a solenoid that turns it on and off, it (the lock up part) works by pressure. There is not a magic switch or valve that will turn it off. Most of the time a new torque converter is the only fix, but not always. Allison is a different bird than the GM trans. GM let us fix that at the dealer Allison would have us pull it and replace it.

Posted on Jul 31, 2009

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