15 lml problems - Chevy and GMC Duramax Diesel Forum
11-16 LML Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

 
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post #1 of 6 (permalink) Old 11-11-2019, 12:46 PM Thread Starter
 
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15 lml problems

2015 gmc denali lml dmax. Truck was fully delted, 5 inch straight pipe, 66mm turbo, ppei tunes. All work was done in april this year and truck has ran fine until last week when temperature dropped below 50 degrees started running intermittent and loses power and has a bad vibration. But when it warms up above 50 degrees it runs fine again. Any tips?
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post #2 of 6 (permalink) Old 11-13-2019, 05:12 PM
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Sounds like your fuel has gelled. Try getting your truck into a heated garage and add a healthy dose of anti gel like Power Service or Lucas.

2018 Toyota Tundra Platinum Crewmax
SOLD:2008 LMM Silverado 2500 LTZ ECSB 4X4.
Aftermarket DSP5 calibration by Danville Performance, Blocked and re-routed, Nicktane with Baldwin BF7587, PPE lift pump with Baldwin BF1212 water separator, 285/75/17 Dura Grapplers on H2s, CTS Insight with pyro.HIDs in fogs and high beams.

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post #3 of 6 (permalink) Old 11-13-2019, 06:35 PM
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Gelling at 50 degree's (F I assume ) seems unlikely. I assume this is outside temp and it run poorly until the outside temp gets up around 50?

Not an expert here - just trying to clarify.

2015 3500 LTZ Dually
B&W Turnover & Companion
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post #4 of 6 (permalink) Old 11-13-2019, 07:59 PM
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Not gelling at that temperature.

2012 QCSB/Built 6.8L Cummins/48RE/Gated shifter
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post #5 of 6 (permalink) Old 11-14-2019, 06:24 AM
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Change fuel filter. Add anti gel. Buy good fuel. Check for air leak. Bad o ring could leak when cold.

2012 3500hd srw 4 wd EFILive cp3 conversion dsp5 Jamco exhaust Blue Ridge Diesel lift pump Trifca bed cover B& W gooseneck hitch
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post #6 of 6 (permalink) Old Today, 02:38 AM
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Quote:
Originally Posted by Chakara View Post
Gelling at 50 degree's (F I assume ) seems unlikely. I assume this is outside temp and it run poorly until the outside temp gets up around 50?

Not an expert here - just trying to clarify.
LOL, yes you're right. We have had some nut numbing temps around here lately and forgot about the rest of the country.

2018 Toyota Tundra Platinum Crewmax
SOLD:2008 LMM Silverado 2500 LTZ ECSB 4X4.
Aftermarket DSP5 calibration by Danville Performance, Blocked and re-routed, Nicktane with Baldwin BF7587, PPE lift pump with Baldwin BF1212 water separator, 285/75/17 Dura Grapplers on H2s, CTS Insight with pyro.HIDs in fogs and high beams.

Proud Member U/A Local 693 Plumbers/Pipefitters.
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