GM 3.0L Duramax diesel known problem in the cold with no fix

Tim Esterdahl

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January 24, 2025
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7 comments

Tim Esterdahl

|

January 24, 2025

|

7 comments

3.0L duramax diesel known problem

The GM 3.0L Duramax diesel is a fuel economy champion and one of the best engines GM has built in years. However, it still has a known issue in the cold, which has not been fixed.

GM 3.0L Duramax diesel known problem

What issue am I referring to? The high fan speed after plugging in the truck.

A few years ago, I discovered this issue myself with a 2023 Chevy Silverado 1500 High Country I bought for a longer review. According to the owner’s manual, I had plugged the truck in at below-zero temperatures.

When I was ready to leave, I unplugged the truck and started it up. The engine fan started running so high that it was very noticeable outside the truck. I assumed it was just a fluke and that it would calm down the more I drove it around.

It did not calm down. I drove 90 miles that day and made multiple stops with varying lengths of time, up to an hour, with the truck off. Each time I started it up, the fan went to high. I tried remote start as well to no avail.

I made a video on it and figured it was a software fix for GM and they would take care of it.

However, I was recently on a LZO Duramax diesel Facebook group and numerous owners are stating it is still happening. With a recent cold snap hitting most of the country there were several posts a day on this topic.

The only fix is to disconnect the battery cables which forces the truck to do a hard reset. Then, the fan resumes its normal operating behavior.

Easy fix for the owner, but not something you really want to do when it is bitter cold outside.

Our take

These are the kinds of things that annoy new truck buyers. They even wait until all the “bugs are worked out” only to discover the bugs are still there years after a new truck has been launched.

Tim Esterdahl

Automotive Journalist Tim Esterdahl has covered the industry since 2011 and has been featured in many national magazines and articles like CBS Sunday Morning, News Nation, MotorTrend, Boston Globe and others. He has won awards for his work and is recognized as a truck expert in his field. In his spare time, he is often found tinkering on his '62 C10 pickup, playing golf, going hunting and hanging out with his wife and kids in Nebraska.

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testerdahl

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2,716 messages 4,596 likes
Pinned Jan 24, 2025

The GM 3.0L Duramax diesel is a fuel economy champion and one of the best engines GM has built in years. However, it still has a known issue in the cold, which has not been fixed. GM 3.0L Duramax diesel known problem What issue am I referring to? The high fan speed after plugging in the truck. A few years ago, I discovered this issue myself with a 2023 Chevy Silverado 1500 High Country I bought for a longer review. According to the owner’s manual, I had plugged the truck in at below-zero temperatures. When I was ready to leave, […] (read full article...)

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c
cbusht

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3 messages 0 likes
#1 Feb 04, 2026

The GM 3.0L Duramax diesel is a fuel economy champion and one of the best engines GM has built in years. However, it still has a known issue in the cold, which has not been fixed. GM 3.0L Duramax diesel known problem What issue am I referring to? The high fan speed after plugging in the truck. A few years ago, I discovered this issue myself with a 2023 Chevy Silverado 1500 High Country I bought for a longer review. According to the owner’s manual, I had plugged the truck in at below-zero temperatures. When I was ready to leave, […] (read full article...)

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c
cbusht

New member

3 messages 0 likes
#2 Feb 04, 2026

I bought a 2023 Chevy Silverado with the 3.0 Duramax... The first time with the temperatures in the low 20s, I plugged it in... I found the same symptoms you described. Took it to the dealership and they pointed out it was not to be plugged in at anything above 18 degrees F. Disappointing to hear it will do the same thing when below 18F. When at home, I remote start it and let it run a couple of minutes befor edriving. Even if I don't remote start, I let the oil circulate for a couple of running minutes before driving... and then I'm easy on acceleration. Treat it well, hopefully it will treat me well...

Recently with the temps down in single digits, I did NOT plug it in, and after turning onto a busy road 2 miles from my home, the engine started to run rough and produced an instrument panel message of "Reduced Acceleration". I pushed the dismiss button and carried on... Seemed normal. Parked for a couple of hours and on the return drive, about 2 1/2 miles from being parked, once again turning onto a main road and starting to accelerate (I am usually gentle on acceleration - not hot rodding), it did the same thing again, only this time without a message. My thoughts were..."if you want exercise, I will give you exercise and ran it through the first 3 gears at high power.
I keep the tank full, especially in cold weather and only run it below 1/4 if I am on a long trip... DEF stays in the nearly full range. Still under warranty.

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Avatar of TheDo114
TheDo114

Well-known member

761 messages 1,203 likes
#3 Feb 05, 2026

The thing about not plugging it in below 18f makes no sense. Let people plug in their truck at any temperature below freezing. Like what’s the downside, the engine and oil are up to temp faster?!

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D
Dusdaddy

Well-known member

1,354 messages 2,020 likes
#4 Feb 05, 2026

I bought a 2023 Chevy Silverado with the 3.0 Duramax... The first time with the temperatures in the low 20s, I plugged it in... I found the same symptoms you described. Took it to the dealership and they pointed out it was not to be plugged in at anything above 18 degrees F.

Well, that's just damn goofy. I agree, should be able to plug it in at any temp honestly.

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Andy

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25 messages 56 likes
#5 Feb 06, 2026

Have a 2024 3.0. Was 3 deg F in the morning, oil temp was 9 deg. Plugged it in for 3 hr, went up to 20 deg and started w/ no issue.
I think there was a software update for earlier years that fixed that fan issue

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c
cbusht

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3 messages 0 likes
#6 Feb 07, 2026

I will ask next time I do an oil change... Last driving in cold weather, I got some engine hesitation after a couple of miles and turning onto a larger highway and accelerating- like a miss with an accompanying "Decreased acceleration" message pop up... I pushed the button to dismiss and drove on with out being able to notice any difference. After another couple of hours on the return trip, again, after a 2 mile 40 mph drive turning out on the main road there were hesitations - and I decided to give it some exercise at higher rpm shifts. It ran ok. Haven't been back in such low temperatures... I have a letter telling me if the transmission acts up with jerky actions - there may be a recall to perform, but these hesitations didn't seem like tranmission issues... I keep the tank full.
Thoughts?

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Andy

Member

25 messages 56 likes
#7 Feb 09, 2026

Hopefully you have winterized diesel in your area. Fuel gelling? The engine should save any non check engine light codes that could shed light to that.
I had a +5 deg cold start this week. No block heater, fired right up. I am now running Power Service fuel additive with anti gel. The previous 3 deg cold start with block heater on I heard the tank fuel pump making a little noise.
Watching my iDash gauge the oil / water warm up to 25 deg by the time I scrape the windows and such.

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