transmission fluid in coolant system

[bill van nes]

Just purchased a 2022 Silverado trail boss 2.7ltr auto and had my coolant somehow mix with the transmission fluid. 5000 km on the truck. Warranty is looking after it but they are replacing alot of parts!!! Keep an eye out if your coolant surge tank looks like a strawberry milkshake coming out of it!! you will get an overheat message and to idle vehicle to cool down. with supply chain issues still in effect its taking a couple of weeks just to get parts!!

[Texcl2]

Wow, that sucks. I have t heard of this defect before with the 2.7’s might be a freak thing. I’d make sure they extend your warranty on their dime.  Sounds like a defective radiator since the transmission lines are in there?

Edited July 29, 2022 by Texcl2

[newdude]

On 7/28/2022 at 4:59 PM, bill van nes said:

Just purchased a 2022 Silverado trail boss 2.7ltr auto and had my coolant somehow mix with the transmission fluid. 5000 km on the truck. Warranty is looking after it but they are replacing alot of parts!!! Keep an eye out if your coolant surge tank looks like a strawberry milkshake coming out of it!! you will get an overheat message and to idle vehicle to cool down. with supply chain issues still in effect its taking a couple of weeks just to get parts!!

 

On 7/29/2022 at 11:15 AM, Texcl2 said:

Wow, that sucks. I have t heard of this defect before with the 2.7’s might be a freak thing. I’d make sure they extend your warranty on their dime.  Sounds like a defective radiator since the transmission lines are in there?

 

 

Read here:  Overfilled Engine Coolant Reservoir with Discolored Coolant – TechLink (gm-techlink.com)

 

Its a possible issue on 2.7T and 3.0 Duramax.  Internal leak of the transmission oil cooler.  Trucks affected are produced from 3/1/2021 to 2/27/2022. 

 

The 2.7T specifically uses just an oil to water (and oil to air) cooler block for the transmission.  Its mounted on the left side.  The transmission has no flow to the radiator like the V8s do, so its just too this cooler.   Pic of the 2.7 cooler below:

 

 

 

[Texcl2]

My truck was built 05/22 so I guess i

 safe . I’ve seen that exchanger while serving my Trailboss, interesting they used one instead of just running it straight through the radiator, I mean it’s still using the radiator fluid to heat/cool the tranny. It must be part of the new upgraded cooling package GM talks about. It’s supposedly made to warm everything quicker and keep it at optimum temps to get better efficiency.

 

should be a simple fix for you at least, I hope it works out for you.

Edited August 3, 2022 by Texcl2

[silveradosid]

what stops the engine coolant from getting into the tranny. once the engine is up to temp usually the coolant pressure pushes coolant in to the tranny

[GMCustomerService]

On 7/28/2022 at 4:59 PM, bill van nes said:

Just purchased a 2022 Silverado trail boss 2.7ltr auto and had my coolant somehow mix with the transmission fluid. 5000 km on the truck. Warranty is looking after it but they are replacing alot of parts!!! Keep an eye out if your coolant surge tank looks like a strawberry milkshake coming out of it!! you will get an overheat message and to idle vehicle to cool down. with supply chain issues still in effect its taking a couple of weeks just to get parts!!

This is certainly not what we like to hear, bill van nes.  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 2022 Silverado Trail boss. To do so, please send an email to [email protected] with ATTN: bill van nes/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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[Texcl2]

Wow, that’s pretty good of GM to take interest. 

[bill van nes]

its funny how GM seems to care here, when they did not seem to care when talking to them about my issue talking in person. Driving a little Hyundai Kona for courtesy car when I should get like for like. Already missed one event with my dirt bike. Then when Onstar told me at the beginning they would get my truck home when repairs were done and now they won't as an employee should not have told me that, I cancelled my Onstar and again they did not seem to care that I did.

If gm cares they can call Murray Chevrolet in Merritt BC as they have been the only ones giving me updates and doing the best they can for me which is appreciated!! Maybe they can help them get the parts a little quicker as it has been in their shop for 4 weeks today so far!

[Steve-2019]

Yea Bill, it's really degusting these days the way GM doesn't care except for they're bottom line.  I've been brand loyal with Chevrolet for 40+ years and this will most likely be my last.     Good luck to you and "hopefully" you'll get fixed sooner than later. 

[Texcl2]

Man it’s still in the shop! That’s awful! I hope they get your parts soon.

[bill van nes]

UPDATE:

 

Now into week 6 and truck still in the shop! Parts supply chain not good for major problems like this!! Dealer tells me he is hoping for this week!

[Marc Haley]

My 2019 Silverado developed a shake in the steering wheel so I took it into a Chevy dealership today and they stated that I need a brand new transmission!!! They stated that the part that holds the radiator coolant broke and leaked into the transmission fluid thus causing me to need a brand new transmission!!! I purchased this truck brand new, I have 76,000 miles and already need a new transmission! I can not believe this! I'm at a loss for words!

[Texcl2]

Wow, that stinks hopefully they cover part of it.