Duramax running temp.

[gsmall]

Are they behind trans cooler and all I can see is small coolers like a/c.and trans

 

[gemarsh]

They would be in front of the cooling stack. Sounds like you don't have them.

 

[gsmall]

Nop. Looking through the grill all I see is cooler radiators. I am going to check with dealer to. Thanks

 

[E.Reed]

2020 3.0 duramax runs Hot. Temp gauge reads 210 to 235. Ran at 210 for first 65,000 miles and dealer doesn’t know what to do to fix it. Told me that’s the best they can do?

What temp? Oil or trans temp. My oil runs mid 200 to 225. My trans well, I put a new larger pan, a trans bypass and a larger trans cooler. Trans temp on a 100 degree day pulling my boat might get upto 140-150. It use to be 198- 205. I'm not on here all the time. Text are welcome 325-518-4038

 

[jeperez087]

Im having the same issue, I have a 2020 chevy 1500 with the 3.0 Duramax. My temp goes above 210 and it fluctuates. The flow control valve was recently replaced along with the radiator due to a small leak but the issue persists. Since so many people are having the same issue has anyone been able to figure out what the actual fix is. I don't think is a normal thing for the temp gauge to fluctuate like that.

 

[gemarsh]

Im having the same issue, I have a 2020 chevy 1500 with the 3.0 Duramax. My temp goes above 210 and it fluctuates. The flow control valve was recently replaced along with the radiator due to a small leak but the issue persists. Since so many people are having the same issue has anyone been able to figure out what the actual fix is. I don't think is a normal thing for the temp gauge to fluctuate like that.

Welcome.