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#help 2500hd allison allison 1000 bad injectors banks biodiesel brakes chevrolet silverado 2500 chevy cognito coolant coolant leak cp3 cp4 def deleted denali diesel diesel fuel dpf dpf delete drivetrain dtc error codes dually duramax duramax 2500hd duramax 6.6 ecm edge efi efi live egr egr delete electrical electrical problems engine engine smokes 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 leak leaking led pods lift limp mode lly lly duramax lly durmax lml lml duramax lmm lmm duramax no start noise oil oil pressure overheating p0087 p0700 powertrain ppe programmer reduced power rims smoke steering suspension tcm tires tow towing trans transfer case transmision transmission transmission problems tune tuner tuning turbo wheels white smoke will not start wiring
  1. 11-16 LML Duramax Powertrain
    Hi guys. My lml has been making this sound for about a year now. It doesn’t do it everytime I drive it, but when it does it’s after the truck is warmed up. Runs and drives perfectly. No one can seem to figure it out was just wondering if anyone has heard this before. Coming from right behind the...
    knock lml loud tick
  2. 2011-2016 (Non Powertrain)
    Hi guys. My duramax has been doing this for about a year and no one can figure it out. Runs and drives great. Daily driven, even under full throttle. Does it about half the time. Noise disappears as I drive. Has anyone heard this sound? Sounds like it’s coming from right behind the gmc emblem...
    knocking lml tick ticking
  3. General Discussion
    Need help if anyone can give me some insight on the noise. 03 lb7 making this noise in the morning on cold starts under 45 degree weather. After I drive it a mile down the road the noise goes away. Its a clicking whining noise coming from around Bell housing/oil pan/ bottom engine. Any help...
    lb7 tick whine
  4. 01-04.5 LB7 Duramax Powertrain
    hey everybody. i recently got this dmax lb7 and i was told that the injectors were replaced around 20000 miles ago. it is a retired formans truck from a local company here near me. anyways, i noticed a knock upon crusing speeds, so i took it the the dealership in hopes of getting new...
    knock missfire tick
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