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  1. Duramax First Generation: 2001-2004 (LB7)
    Having an issue with my 03 LB7. Replaced injectors 2500 miles ago. Trucks been running great until I hooked onto the two car enclosed trailer and drove 30 miles north to race. On the return trip I looked back and could no longer see the trailer or any vehicles behind me. I slowed down and got...
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