2021 Silverado fluid changes

[Curtisjame91]

I just picked up a 2021 Silverado with the 2.7l turbo and 8l90 and was wondering if anyone had done all the fluid changes im thinking of a case of 12 Amsoil atf for the transfer case and the transmission and then I already have 6 quarts of 75-90 Mobil 1 full synthetic gear oil for both diffs is 12 quarts enough trans fluid for the filter change and transfer case or will I need more? And also does anyone have part numbers for the front and rear differential gaskets?

 

[Mcbeem5]

Chevrolet Differential gaskets have been reusable for years,they are pretty well made !

 

[4WD]

For many years - I backed off the bolts to make it drain - come back and squeezed a half quart 75W90 flush in - torqued - then filled with Delvac 1 … At least 4 Silverado/Tahoe units …

 

[Curtisjame91]

I didn’t know that thank you all I will reuse the gaskets!

 

[4WD]

Delvac 1 can be a bargain on Summit Racing - such an interesting product that the Porsche track crowd loves what’s made for 80,000 lbs + beasts - but its proven in all of that stratosphere …
I always toss in something else to get free shipping …

 

[4WD]

I didn’t know that thank you all I will reuse the gaskets!

GM gaskets tend to be metal backed AEM - just reused a 2017 gasket on a 6L80e bcs “brown” did a great job of smashing my new gasket - no leaks

 

[CKN]

I just picked up a 2021 Silverado with the 2.7l turbo and 8l90 and was wondering if anyone had done all the fluid changes im thinking of a case of 12 Amsoil atf for the transfer case and the transmission and then I already have 6 quarts of 75-90 Mobil 1 full synthetic gear oil for both diffs is 12 quarts enough trans fluid for the filter change and transfer case or will I need more? And also does anyone have part numbers for the front and rear differential gaskets?

I wouldn't touch the transmission fluid until I found out if your VIN includes one of the 8 speeds that had issues-and if a dealer changed out the fluid previously-which (according to GM) was a remedy.

Chevrolet Has Finally Found a Fix for the Silverado Transmission Shifting Problems

Chevrolet just announced a fix for its beleaguered 2022 Silverado 1500 transmissions. Here are the details.

www.motorbiscuit.com

 

[Curtisjame91]

I wouldn't touch the transmission fluid until I found out if your VIN includes one of the 8 speeds that had issues-and if a dealer changed out the fluid previously-which (according to GM) was a remedy.

Chevrolet Has Finally Found a Fix for the Silverado Transmission Shifting Problems

Chevrolet just announced a fix for its beleaguered 2022 Silverado 1500 transmissions. Here are the details.

www.motorbiscuit.com

Is there a list of effected vins yet?

 

[CKN]

Is there a list of effected vins yet?

Talk real nice to the service advisor at your local Chevrolet dealership-ask them to run a history on your truck.

 

[Curtisjame91]

Talk real nice to the service advisor at your local Chevrolet dealership-ask them to run a history on your truck.

I did lol they said there no service bulletin or decals at all on the transmissions

 

[CKN]

I did lol they said there no service bulletin or decals at all on the transmissions

What does that mean? I assume you are saying they have no record of transmission service? I assume they do have service records of oil changes? Most buyers have the dealer change the only during the warranty period.
Do you have a service history?

 

[Curtisjame91]

What does that mean? I assume you are saying they have no record of transmission service? I assume they do have service records of oil changes? Most buyers have the dealer change the only during the warranty period.
Do you have a service history?

I asked if there were any open service bulletins or recalls on the truck and gave them the vin they said there is one for a fuel control module but nothing for the Silverado 1500 transmission's

 

[CKN]

I asked if there were any open service bulletins or recalls on the truck and gave them the vin they said there is one for a fuel control module but nothing for the Silverado 1500 transmission's

OK-you don't have a service history. Wouldn't you find one informative?

 

[Curtisjame91]

I didn’t ask about a service history I only asked about the service bulletin mentioned above and any open recalls. One would be useful but unfortunately I don’t have one and can’t say that any used vehicle I’ve ever bought has had one.