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  1. Duramax Fourth Generation: 2007.5-2010 (LMM)
    2009 Chevy Duramax 3500HD 4 door 8 ft bed 2WD DRW 227,000 miles - stock motor New oem injectors Aux fuel pump -Air Dog New fuel filters New air cleaner Egr disabled No cat No DE filter canister (tuned for those being gone) 40 hp boost with tuner New high pressure fuel reg. new high pressure fuel...
  2. Duramax Seventh Generation: 2020+ (L5P)
    I picked up a Black Diamond Denali on the 4th and drove it 220 miles home. On the trip there my 17 Denali got 19mph on the way there driving about 80mph. On the way home i got 13. There wasn't any wind either. I know it needs to break in a little but it's not going to come up 50%. I'm at...
    mpg
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