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Duramax Fifth Generation: 2011-2016 (LML) Discuss the fifth generation (2011-2016) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

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Old 03-19-2019, 08:06 PM   #1 (permalink)
VipeRTBlck
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2016 regen smoke

had truck since new, has 13000 on it now; noticed smoke during the regen today on a hard accel. never noticed smoke before. question is, while trucks are in regen, is a haze/smoke from the tail pipe during accel a normal condition? called dealer and they said ya it can be. no CEL or dash lights are on.

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Last edited by OkDually; 03-19-2019 at 08:27 PM. Reason: prefix
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Old 03-19-2019, 10:55 PM   #2 (permalink)
BanksLB7Duramax
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Do a search, very common. My truck will pour white smoke so thick I can’t see the cars behind me.

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Old 03-20-2019, 08:02 AM   #3 (permalink)
gmc502
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yup,its normal,,saw it from my truck do it on the highway.freaked for a bit,then next time it happened,I'm like,,this has to be normal.
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Old 03-20-2019, 06:45 PM   #4 (permalink)
JBear
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And when people behind you have to slam on the brakes because they suddenly can't see where they're driving anymore and get SO pissed about it that they follow you to your next stop to chew you out for "how ****ty your truck runs", and how "you're destroying the environment", just try to keep a straight face while attempting to explain to them that our government has determined that they were temporarily engulfed in an opaque cloud of god-knows-what because that makes it run cleaner...
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Old 03-20-2019, 09:46 PM   #5 (permalink)
BanksLB7Duramax
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LOL! Exactly! I can’t wait to be pulled over by an officer telling me that my emissions system has been tampered with and then proving to them that my truck is stock and operating as required by the EPA!!
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Wishing it sounded like my old LB7 with Banks exhaust. . . . . . .
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Old 03-20-2019, 10:05 PM   #6 (permalink)
LBZjunkie
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And don't forget that burning this chemical that came from a non recyclable plastic bottled boxed in a carboard box!
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Old 03-21-2019, 06:48 PM   #7 (permalink)
D_R_C
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This makes sense during a regen with the additional fuel added to burn off.
Deleted mine does the samething after mild city driving for a while then getting on a freeway and merging in.
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Old 03-21-2019, 11:53 PM   #8 (permalink)
Ted White
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When the 9th injector was first added to inject fuel during regens, clouds of white smoke were the symptoms of a faulty injector. If the spray from the injector is uneven, with too many large fuel droplets, white smoke is produced. So, although a lot of folks are saying it is normal, I can't help wondering whether the 9th injectors are ageing and becoming problematic.
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Old 03-22-2019, 12:12 AM   #9 (permalink)
BanksLB7Duramax
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Mines done it since new. I’ve brought it up to several different techs and they all say it’s normal and I regularly see it on trucks both old and new on the street.
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2012 CCLB 3500HD Z71 Appearance Package Dmax/Alli
275/70-18 Cooper ST Maxx - Air Lift Bags - Viair Onboard Air - B&W Turnover Ball
Wishing it sounded like my old LB7 with Banks exhaust. . . . . . .
MY FUELLY PAGE LINK

1984 C20 6.2 J Code TH400
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Old 03-22-2019, 12:17 AM   #10 (permalink)
Ted White
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Strange. My LML never smoked during regen, and my L5P never smokes either.

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