New 3.0 Duramax Owner - Early Issues - Chevy and GMC Duramax Diesel Forum
2020+ LM2 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 9 (permalink) Old 12-31-2019, 08:12 AM Thread Starter
 
Join Date: Dec 2019
Location: Gretna, NE
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New 3.0 Duramax Owner - Early Issues

Hey All,

Just wanted to introduce myself and bring up a couple issues that I have had come up early (520 miles). I got a new 4x4 crew cab RST a little over a week ago. I came from the Titan XD with the 5.0 cummins. Decent truck but this Silverado with the 3.0 fits my needs better.

Now onto the early issues. Like others have mentioned, my fans are running full blast. Its relatively cold (24 degrees) here so this is weird. I also got a CEL this morning with the following codes: P111E and P149D. The on-star diagnostic email said it is "An issue with the Engine and Transmission System". I've got an appointment made for Thursday morning to get it looked at. I'm not sure if this is the reason for the issue or just a coincidence, but last night I installed the auto-stop eliminator.

I'm not too worried about these early issues. This is a new powertrain and there are bound to be some growing pains. I will keep everyone updated as to what the dealer says and does to fix these codes.

Happy New Years Everyone!
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post #2 of 9 (permalink) Old 12-31-2019, 09:29 AM
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See the later post concerning the fans.

2019 Chevrolet 4500HD CC 4X4 Flatbed
2018 Chevrolet 1500 CC 4X4 High Country 6.2 liter
2019 Chevrolet 3500HD CC 4X4 Flatbed--SOLD
2011 Peterbilt 337 hauler with 360HP 8.3 Cummins--SOLD
1957 GMC 1 ton flatbed with 22K original miles.
3 different Kubotas
2003 Chevrolet 2500HD CC: 2011 Chevrolet 3500HD CC 4X4 and 2013 3500HD ex. cab 4X4-- all sold.
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post #3 of 9 (permalink) Old 12-31-2019, 10:45 AM Thread Starter
 
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Quote:
Originally Posted by sambor View Post
See the later post concerning the fans.
Could you elaborate a little or point me in the right direction? TIA

2020 Silverado 1500
Crew Cab 4x4 RST
3.0 Duramax
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post #4 of 9 (permalink) Old 12-31-2019, 11:13 AM
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There is a post farther down concerning the 3.0 dmax fans. It is further explained at " gmtechlink.com". On the latest newsletter. Has to do with ecm programming and use of block heater.

2019 Chevrolet 4500HD CC 4X4 Flatbed
2018 Chevrolet 1500 CC 4X4 High Country 6.2 liter
2019 Chevrolet 3500HD CC 4X4 Flatbed--SOLD
2011 Peterbilt 337 hauler with 360HP 8.3 Cummins--SOLD
1957 GMC 1 ton flatbed with 22K original miles.
3 different Kubotas
2003 Chevrolet 2500HD CC: 2011 Chevrolet 3500HD CC 4X4 and 2013 3500HD ex. cab 4X4-- all sold.
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post #5 of 9 (permalink) Old 12-31-2019, 01:30 PM
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Cooling Fans Running for an Extended Period

December 13, 2019
Some 2020 Silverado 1500 and Sierra 1500 models equipped with the 3.0L diesel engine (RPO LM2) (Fig. 12) may have the engine cooling fans running continuously for an extended period of time. The Check Engine MIL also may be illuminated.



Fig. 12



Currently, an engine calibration in the Engine Control Module (ECM) will falsely set DTC P0111 (Intake Air Temperature (IAT) Sensor 1 Performance), which occurs when the engine block heater is used in ambient temperatures above 0F/–18C. As a result, the cooling system will go into remedial action and turn on the cooling fans at 100%. The remedial action will continue until the engine goes through a six hour cold soak.

If this condition is found, clear the DTC and return the vehicle to the customer. Do not perform any further diagnosis or replace any related components. An updated calibration will be available shortly.

Also inform the customer to avoid engine block heater use in temperatures above 0F/–18C. While the owner’s manual states an engine block heater should be used in temperatures less than 0F/–18C, it isn’t vital until much lower temperatures of less than –13F/–25C.


.

2018 GMC 2500 L5P CCSB 4x4 Denali - Mineral Metallic; previous '11 LML, '10 LMM and 04.5 LLY

Last edited by redwngr; 12-31-2019 at 01:32 PM.
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post #6 of 9 (permalink) Old 12-31-2019, 01:34 PM
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Quote:
Originally Posted by Nehunter13 View Post
Hey All,

Just wanted to introduce myself and bring up a couple issues that I have had come up early (520 miles). I got a new 4x4 crew cab RST a little over a week ago. I came from the Titan XD with the 5.0 cummins. Decent truck but this Silverado with the 3.0 fits my needs better.


Happy New Years Everyone!
Congrats and welcome...

2018 GMC 2500 L5P CCSB 4x4 Denali - Mineral Metallic; previous '11 LML, '10 LMM and 04.5 LLY
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post #7 of 9 (permalink) Old 12-31-2019, 01:41 PM Thread Starter
 
Join Date: Dec 2019
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Quote:
Originally Posted by redwngr View Post
Cooling Fans Running for an Extended Period

December 13, 2019
Some 2020 Silverado 1500 and Sierra 1500 models equipped with the 3.0L diesel engine (RPO LM2) (Fig. 12) may have the engine cooling fans running continuously for an extended period of time. The Check Engine MIL also may be illuminated.



Fig. 12



Currently, an engine calibration in the Engine Control Module (ECM) will falsely set DTC P0111 (Intake Air Temperature (IAT) Sensor 1 Performance), which occurs when the engine block heater is used in ambient temperatures above 0F/18C. As a result, the cooling system will go into remedial action and turn on the cooling fans at 100%. The remedial action will continue until the engine goes through a six hour cold soak.

If this condition is found, clear the DTC and return the vehicle to the customer. Do not perform any further diagnosis or replace any related components. An updated calibration will be available shortly.

Also inform the customer to avoid engine block heater use in temperatures above 0F/18C. While the owners manual states an engine block heater should be used in temperatures less than 0F/18C, it isnt vital until much lower temperatures of less than 13F/25C.


.
Thank you. That is extremely helpful!

2020 Silverado 1500
Crew Cab 4x4 RST
3.0 Duramax
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post #8 of 9 (permalink) Old 12-31-2019, 06:13 PM
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Thank you RW for posting the tech info. Maybe it will help the guys with the new baby dmax's

2019 Chevrolet 4500HD CC 4X4 Flatbed
2018 Chevrolet 1500 CC 4X4 High Country 6.2 liter
2019 Chevrolet 3500HD CC 4X4 Flatbed--SOLD
2011 Peterbilt 337 hauler with 360HP 8.3 Cummins--SOLD
1957 GMC 1 ton flatbed with 22K original miles.
3 different Kubotas
2003 Chevrolet 2500HD CC: 2011 Chevrolet 3500HD CC 4X4 and 2013 3500HD ex. cab 4X4-- all sold.
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post #9 of 9 (permalink) Old 12-31-2019, 11:57 PM
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Quote:
Originally Posted by sambor View Post
Thank you RW for posting the tech info. Maybe it will help the guys with the new baby dmax's
Thank you for finding it.

I hadn't been to techlink for awhile.

2018 GMC 2500 L5P CCSB 4x4 Denali - Mineral Metallic; previous '11 LML, '10 LMM and 04.5 LLY
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