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    98mph, no further? :(

    Hey Guys (& Gals), brand new to this site. This is my 4th Duramax and have always had good luck with them. This one is a 2015 GMC 1 ton 4x4 Crew Cab Denali - Black on black. at 11,500 have had some goofy issues but have 2 items I really want to get corrected. It won't go past 94(95 once)...
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