Recent content by paul04duramax

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    04 LLY Trans DTC's

    I have a bone stock 04 LLY. I have a problem, but it only happens when the outside air temps are 90 and over. Driving on flat roads, cruise set at about 60mph, the transmission will downshift for a second and then shift back to overdrive. Sometimes it will do this several times. The CES...
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