2020 3500 6.6 Duramax Fan stays on

[jfatboy54]

I have a 2020 3500 Denali and the engine light came on about 2 months ago and the cooling fan stays on.   Took it to the dealer and they scanned and replaced the whole fan assembly and as soon as I got back in the truck and started it, same thing.   Engine light and fan came back on.  It does seem to cut off or slow down when I get up to running normal highway speeds.  Any help would be greatly appreciated.

[GMCustomerService]

On 7/19/2022 at 11:00 AM, jfatboy54 said:

I have a 2020 3500 Denali and the engine light came on about 2 months ago and the cooling fan stays on.   Took it to the dealer and they scanned and replaced the whole fan assembly and as soon as I got back in the truck and started it, same thing.   Engine light and fan came back on.  It does seem to cut off or slow down when I get up to running normal highway speeds.  Any help would be greatly appreciated.

This is certainly not what we like to hear, jfatboy54.  Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your 2020 3500 Denali. To do so, please send an email to [email protected] with ATTN: jfatboy54/GM Trucks in the subject line.

Please include your contact information, VIN, a brief description of your concern, and the name of your preferred dealership. We look forward to hearing from you. To learn more about GM’s privacy policy, please visit https://www.gm.com/privacy-statement.html.
 
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[redwngr]

Did you let your dealer know that the problem still exists?