How cold will my Duramax start without plugging in - Page 11 - Chevy and GMC Duramax Diesel Forum
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Old 02-26-2013, 03:54 PM   eBay Motors  #101 (permalink)
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If gas came out then you have issues

What do you mean froze up?
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Old 02-27-2013, 09:14 AM   eBay Motors  #102 (permalink)
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Well I plugged in the block heater for an hour and it started so I'm guessing there may have been some water in the gas? Idk
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Old 02-27-2013, 09:46 PM   eBay Motors  #103 (permalink)
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Lol, every time you say gas, someone is gonna say something about it. Try 'fuel' -an extra letter to type, but works much better
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Old 02-28-2013, 07:07 AM   eBay Motors  #104 (permalink)
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Mine sits for many days at a time and never a problem up in North Dakota. The worst time was about 8 days without running, pointing front first into the cold north winds, air temp -20 to -30F with windchill running -50 to -55F. Unbelievably cold but she started up first crank. I should have plugged it in but it was too cold to mess with and I wanted to see how it started. It was loud and didn't like it but after 30 sec it idled up and was just fine. This is on a 2012 LML, I use optilube as well so the fuel doesnt freeze up.

Plug it in if you want it to warm up quicker otherwise dont worry about it, it will start. Doesn't get much worse than what mine has went through.
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Old 12-04-2013, 06:36 AM   eBay Motors  #105 (permalink)
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We'd chill doesn't affect vehicles the same as people. It will cool them off quicker after shut down but if it's - 20 with a windchill of - 30 it's still only - 20 to your truck. I had to start mine in - 30 Celsius once after not plugging it in, started but didn't like it.

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Old 12-04-2013, 07:23 AM   eBay Motors  #106 (permalink)
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This is funny because my 2007.5 lmm started for a week an a half last year in steam boat colorado snowboarding it got down to -10 to -20 every night never plugged the truck in and fired like a kitten every night !! dont worry about starting a duramax in the cold.
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Old 12-07-2013, 06:40 PM   eBay Motors  #107 (permalink)
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Simply put its so much easier on the engine to have it plugged in. Duramaxs will start when it's in the negatives, it will take longer to crank and you'll get a rough idle but it will start. Its just not good for your motor. Plug it in... you have a block heater, use it. Last year I had to cold start all winter because I had nowhere to plug it in, and it fired up every single time. Coldest it got was 0'f and it fired up after cranking for 3-4 seconds. Regular conventional oil and some diesel Kleen.

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Old 12-07-2013, 06:48 PM   eBay Motors  #108 (permalink)
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Boss started our lmm work truck Friday when it was -30F and wasnt plugged in it started but its not something I'd want to do too many times.

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Old 12-29-2013, 06:34 PM   eBay Motors  #109 (permalink)
 
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-15C or -15F
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