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#help allison allison 1000 bad injectors banks battery biodiesel brakes check engine light chevy codes coolant coolant leak cp3 cp4 crank but no start crank no start def denali diesel diesel fuel diode dynamics dpf dpf delete drivetrain dtc error codes duramax duramax 2500hd duramax 6.6 ecm edge efi efi live egr egr delete electrical electrical problems engine exhaust for sale fuel fuel additives discussion fuel filter fuel mileage fuel system problems gmc head gasket help injector injectors intake knock knocking l5p lb7 lbz lbz duramax leak leaking led pods lift lift pump limp mode lly lly duramax lly durmax lml lml duramax lmm lmm duramax no start noise oil oil pressure p0087 p0700 ppe reduced power rims silverado smoke steering suspension swap tcm tires towing trans transfer case transmision transmission transmission problems tune tuner tuning turbo wheels white smoke will not start wiring

  1. BA2437E3-3738-4854-AE38-ED777495547B.jpeg

    Fall Days in PNW AT4
    at4

  2. 754C1CCE-A637-4429-8709-2656614D5B41.jpeg

    New tonneau cover
    at4

  3. 19E1EA23-3408-4F4C-AAD5-3C60311D3218.jpeg

    2021 AT4 interior
    at4

  4. 78E5DF15-5284-4699-AE95-183081624A5D.jpeg

    2021 ATV 3500 - new shoes
    at4

  5. 618A69E9-0C9A-40EA-8122-FCEC467E7503.jpeg

    Idaho bound. Drove like a dream through 2 passes. 2021
    at4 winter driving

  6. A3B3ABD8-3576-46C9-936B-581CE2FD0550.jpeg

    Night mode
    at4

  7. 766E9A0B-B9E5-49E0-9A74-F6EAAD9BCE3A.jpeg

    Hauling toys for service.
    at4
  8. 2020+ GM T1 Platform Powertrain
    I have a new 2021 AT4 Duramax. I filled the DEF fluid for the first time (it has about 2300 miles on it) When I started it to leave the station, the check engine light was on. I drove it home (6 miles) and it didn't go off. Could this be related to filling the DEF tank. I guess it's possible...
    at4 check engine def duramax 6.6
  9. 2020+ (Non Powertrain)
    So it looks like my GMC 2500 Duramax has proceeded to event code 4300 (Intermediate shipping) The robot assistants at GMC tracking messaging system say that shipping is imminent, and refer me to the dealership for schedule. But, the dealer tells a different story. Yes, it's in 4300 but it's...
    4300 at4 duramax shipment transit
  10. Duramaxforum.com News
    at4 brand new rust rusting
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