Plugging up lm2

Fattyz28 · January 16, 2022

How many of you duramax guys plug your truck up on cold nights? And what temperature do you utilize it?First winter owning a diesel, just looking for tips or ideas.

Edited January 16, 2022 by Fattyz28

btj_z71 · January 16, 2022

8 hours ago, Fattyz28 said:

How many of you duramax guys plug your truck up on cold nights? And what temperature do you utilize it?First winter owning a diesel, just looking for tips or ideas.

Not needed until the temperature drops to 0 or below, or you are at a high elevation. It is listed in the diesel supplement. (See below)

Living in southern Alabama, I've never had to use it with my LM2.

https://my.gmc.com/content/dam/gmownercenter/gmna/dynamic/manuals/2021/gmc/multimodel/2021-3l-duramax-diesel-supplement.pdf

gemarsh · January 16, 2022

11 hours ago, Fattyz28 said:

How many of you duramax guys plug your truck up on cold nights? And what temperature do you utilize it?First winter owning a diesel, just looking for tips or ideas.

I plug the 3.0 and the 6.6 in every night, if'n it will be below freezing. I built timers out of pool pump timers for the farm equipment and I made more for our daily drivers.

redwngr · January 17, 2022

I frequently start at 0F or slightly below. We rarely get much below 0F at my location. We often get weeklong periods when daytime temps don't get above 10F. Pickups live outside.

12 or 14 years of 6.6's and the current 3.0s.

Never had one plugged in.

Never had a problem starting one.

Yes, we have several machines/vehicles around that will not start at 32F without being plugged in or given a sniff of ether.

Duramaxes are not in that 'hard to start' category.

They are also quick to warm up.

CamGTP · January 18, 2022

Here is gets to -20F every winter and even colder towards Canada, I'd be more worried about the fuel gelling up than the truck not starting because of low block temp. If it doesn't even get to 0 degrees where you live you technically don't need it.

eckseleven · January 22, 2022

Never plugged mine in. Stretches of below 0F are common this time of year and I've never had an issue starting.

jlong1984 · January 22, 2022

Mine is garaged and I live in NC, so absolutely zero need to plug it in. I can't imagine it's significantly colder in AR than here.

latreille89 · January 24, 2022

I’ve had no issues at -25c but is does start and sound better when it’s been plugged in. Starts better than our Terrain in those temps.

Edited January 24, 2022 by latreille89

Transient · January 24, 2022

On 1/16/2022 at 8:15 AM, gemarsh said:

I plug the 3.0 and the 6.6 in every night, if'n it will be below freezing. I built timers out of pool pump timers for the farm equipment and I made more for our daily drivers.

That's really clever. Have you considered manufacturing these to sell?

gemarsh · January 25, 2022

On 1/23/2022 at 7:03 PM, Transient said:

That's really clever. Have you considered manufacturing these to sell?

Nope. As soon as I would, some company would make them out of chinisium, and put me out of business.

I could do a how to with pictures and part links. I would also build one for a person that didn't feel comfortable.

The 12ga cold weather cords are expensive. But it pays for itself, by not having the heating element burn all evening and night, wearing out the heater element and wasted electricity. The payoff probably is in just one year, if harvest turns wet and cold.