I am still 2k+ miles from the 22500 DCT flush service mileage. But I plan to be on a long road trip when the 22500 point rolls around. How much before the 22500 miles can I get the DCT service done and keep the warranty people happy?

 

…doubt there’s any problem doing this one a couple thousand miles early…it’s the next one you’ll want to make sure you do in 22.5K miles from this one…

 

GM hasn't stated a tolerance window for the 22,500 mile DCT filter change like they have for the 7500 mile DCT filter change. I wouldn't worry about changing it 2K early.

 

I just did mine at 13k miles, but close to 3 yrs. Rather do sooner than later.

 

You can check with your servicing dealer, but based on the responses, sounds like you would be OK doing it early as you suggest.

 

at 3 years GM says the transmission fluid needs to be changed about $900-$1100

 

the bulletin I found says +/- 800 miles....

 

A pure transmission filter change should run in the $275 to $425 range not $850

filter is like $190 and fluid costing $24 a quart is charged out at about $48; then add in the labor charge

 

Can you post a copy or link to that bulletin?

 

What it should run and does run are 2 different things. My dealership I have used for oil changes and the 7,500 service quoted $1,299. I'm gonna check around but not gonna sweat it if I end up paying it. If you can't afford the service, then you shouldn't be a Corvette owner. Its not a self perform service.

BTW, its not an exact science. If you project you will be less than 1k miles over (<23,500), I would wait and do after the trip. Otherwise do now and just do again 3 years later or 22,500 later.

 

yep, exactly. Btw mine was right at about $1k with the 2 extra quarts included.

 

"BTW, better to change early than later doesn't work" for the DCT Filter.
Yep I changed early (year 1 with ~3000 miles) BUT knew I had to change again at 7500 +/- 500 because that is what GM says MUST be done. Yep I changed early BUT followed their requirement and did again at ~8000 miles.

Second all these high prices?! My great dealer, who will do the PDI whenever my E-Ray is built (currently at 3000 but who knows when the build for Customer cars will start) has a great C8 Trained tech.

Below Invoice is what I was changed in August for:

1. Engine oil and filter with GM parts including Supercar oil
2. DCT Filer (with flush)
3. Changing all DCT Fluid as required year 3.

 

Just had the dealer service department perform this DCT service 3k miles early. If you have a 2022 or earlier model, have the dealers do a track ready transmission flush so that they add the extra fluid that now comes from the factory, IIRC started with the 2023 or 2024 model year (I don’t recall which).

 

Boy sure gets twisted! If you don't Track foolish to get the two overfill quarts as a GM Exec called it!

The 2023 Z06 and some late 2023's and all 2024 does NOT come with two extra overfill quarts! Same volume as the standard C8! What they changed is the case to keep DCT fluid under the oil pick-up in the case of Tracking IF going Downhill and turning (when Tracking that's at a high "g.") I use the example I have watched many times, if going down the Laguna Seca Corkscrew.

 

The track fill doesn't include a DCT hydraulic system flush, just two additional quarts of fluid required when tracking a 2020-late 2023. 2023 cars had the newer DCT case starting around mid-July that doesn't require the two additional quarts for tracking. But they don't come with two additional quarts, the case was redesigned similar to the Z06 to eliminate the fluid starvation problem only encountered in some continuous extreme high G track conditions. The newer DCT cases have the same fluid capacity as the earlier cases.

 

In my experience, checking with the service dept is a complete waste of time. Seems they have no idea how to work with a Corvette and I've never seen a complete bunch of incompetent morons in all my years of owning vehicles.

My wife's Lexus and my son's Porsche, those marques treat us like royalty. Chevy, not so much...

 

^^^^
Yep we were well taken care of for the wife's Porsche Cayenne BUT at crazy cost for oil change, brakes etc. They told me after paying ~$250 for an oil change, I needed brakes for $2800 had only ~35,000 miles. Had a friend with a auto shop replace them for $500 and traded it on a made in USA BMW X5 SUV. In fact there are 11,000 workers at the BMW SUV plant in the Western Part of SC. All non-Union shipping them out of Charleston SC all over the world.

She is on her 3rd BMW X5 SUV and loves them. Service is great BUT the key is the large Chevy Dealer is also a BMW and Mercedes dealer in the same location. You're treated as expected at Chevy the few times I brought my prior 5 Vettes there (I did all my own oil changes even passed-up the free ones with my two C7s as didn't trust them to do it right.) The Chevy Service Writer is in a booth like a drive in. Wait your turn after you had made an appointment. The waiting area had typical hard chairs, TV playing some soap opera. If you want something to drink there is a soda machine. Snacks are also available to buy!

Now I pull the BMW into a covered spot ~50 yards away. A Service Writer (there are two) comes out and already knows your name and the car and how long it should take (as you have to make an approximant.) While I wait for the BMW ONLY mechanics to change oil or whatever, I sit on soft sofa type chairs. Few folks there so can usually set what I want on the large TV. Free coffee in a pick what you want fresh brew and free snacks or bottled water! BTW they have ~30 service bays BUT BMW (and Mecedes are walled off.) They ONLY work on BMWs. Chevy and whatever comes in trucks cars SUVs have ~25 center post lifts and one alignment rack. Have watched a Tech kick the lift arms under a car (not Vette) to get them "close" to being where they should be placed. Corvettes are treated the same as a Truck for an oil change, in a septate oil change bay. Some newbie Mechanic working the oil change bay does whatever. Now if it's Vette specific issue you do get a trained Vette mechanic.

Yep get what you pay for! Except BMW changes are not Porsche outrageous. However, admit I don't know what an oil change cost because we were getting 3 years free and that's when we Trade. Actually, get a very good trade value and discounts on new ones.

For the C8 was fortunate to find a small Chevy Dealer 30 miles away who not only agreed to do my PDI they bend over backward to earn my aftersales service. That is why they only chaged $30 for CD. That is the only place I would bring it. They will also do the PDI on my E-Ray now at 3000. Took an effort to find, but well worth it.

 

You have been robbed.

 

You must be kidding. The MSRP for just the Supercar oil, DCT fluid and DCT filter kit is ~$$900! Have only seen a few close!
8 quarts @ $15 for Supercar Oil (it's actually more than that at MSRP) = ~$120
11 quarts of DCT fluid @ $47 MSRP = ~$517
DCT Filter MSRP = ~$245

And done by a great C8 Trained tech! Included a DCT Flush, can't do at home!

 

My mistake Jerry. I apologize.
I didn’t realize you had oil changed also.
I should’ve read it better.