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  1. M

    LB7: Engine Over Boost

    I have a 2004 Chevy Silverado 2500 HD, w/ Duramax 6.6-LB7 & 5 speed Allison transmission I bought new 8 years ago. The last two times I towed my 9,000lb 5th wheel, I got a [ check engine light ] came onand both times it was a [ Engine Over Boost Condition ]. Condition was apx 60 mph with 9k lb...
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