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service 4x4
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  1. 01-04.5 LB7 Duramax Powertrain
    I have a 2004 lb7 duramax and all of a sudden I started getting a service brakes and 4x4 when i’m turning my truck off. It never happens when I’m starting or driving. It’s only when I turn it into accessory mode that these pop up. It also doesn’t turn off for a couple seconds when I go to turn...
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