Got a new C8 in November. I got a notice of a free warrenty oil and filter change today + tires rotation from the dealer.
Sounds like engine oil and filter change only.
A while back I was told by somebody at the dealer the DCT oil and filter change was free after 7000 miles and was also covered. Is that true?
I don't have 7000 miles yet. Can I count on two free oil changes.

John

 

No not 2.
You get 1 free oil/filter change any time you want within the warranty period.
You are required by warranty to have your DCT filter changed at 7500 miles (+/- 500miles). This IS covered under warranty.
You can use either or both services for free once. Any time you want. BUT you still are required to change DCT filter at the specified mileage no matter if you did it at your leisure.
Most C8 owners wait until 7500 miles or so and have both oil/filter change and DCT filter change at GMs expense.

If dealer is pushing for a change now I'd look for another dealer.

Read you owners manual concerning your
WARRANTY

 

If you have a 2024 or 2025, the "free oil change" and the "free" DCT external canister filter change were separated and can be claimed at different times. You should be able to see them in your warranty tracker in you mychevy account. You have two year, with no mileage constraints to claim the free oil change. You have three years to claim the DCT external canister filter change, but you must have at least 7000 miles to claim. No upper mileage limit to claim it, but you must change it between 7000-8000 miles to keep the warranty in force, even if done earlier, and regardless of whether its free or not. No, you do not get two free engine oil/filter changes.

 

I thought it was +/- 1000 miles for the 7500 transmission service.

 

Nope. It in the 2024 and 2025 manuals and in the letter that was recently distributed to all C8 owners. 7500 +/- 500 miles. And, for claiming the free service, you must have at least 7000 miles. This is stated in the FAQ section of the bulletin that announced the split of the services for 2024, not retroactive to previous models.
https://static.nhtsa.gov/odi/tsbs/20...00117-0001.pdf
"Q: The customer wants the filter replaced early, can I
use this warranty coverage to pay for the replacement?
A: No, the odometer must have at least 7,000 miles to
use the factory covered maintenance. If the customer
wants the filter replaced prior to the GM recommended
schedule of 7,500 (+/- 500 miles), it is at their expense."

 

That sucks I'm at 8300, had the free one done at 4400. Been waiting on weather to break around here.

 

So, with a 2022 (I think you have), your manual said "at 7,500 miles" but did not state the size of the window, and did not make clear that it had to be in that window, regardless if changed earlier. That was not made clear for all owners of 2020-2023 models until GM issued the letter in 2024 to all (I though all) owners. Before that, we had to guess how close to "at 7,500 miles" one must be. And dealers were giving advice that was all over the place about that. Did you receive the letter from GM? Were you already past the 8000 miles when you received it? Did a dealer tell you it was +/- 1000?

In any case, I suggest you just get it done now. But...from a filter loading point of view (not a warranty point of view), if you change it at 4400 miles, I do not believe you are in danger of a filter overload. As distasteful as it is, I would go ahead an change it now - while you are just 300 miles over.

 

Mine is a 22, didn't get the letter until right after it turned 8300. It has been parked since November and haven't added any more miles. I haven't talked to a dealer but I read on this forum dealers were saying+/- 1000 miles. Now that the weather is breaking I do plan on getting it done. Shooting for this week.

 

So....there is a tech-link article, dated July 2024, that contains this wording (but beware):

"Engineering recommends that the filter be changed as close to 7,500 miles (12,000 km) as possible – plus/minus 1,000 miles (1,600 km) should not be detrimental."

That very same tech-link article also contains these words:

'If the canister filter is replaced more than 500 miles (800 km) prior to the initial 7,500-mile (12,000 km) break-in period, the filter still needs to be replaced again within plus/minus 500 miles (800 km) of the 7,500-mile (12,000 km) service interval. "

And, perhaps more telling....I received the letter from GM about the required maintenance, stating the +/-500 mile window on or around Nov of 2024, so thats a good 4 months more recent than the tech link article. I know this because I posted it on the forum the same day I received it:
https://www.corvetteforum.com/forums...quirement.html

So, unless the dealer has something in writing, from GM, like an official service bulletin, or a superseding letter from GM stating that the maintenance requirement has changed, I do not believe that one can rely on that "+/- 1000 miles should not be detrimental", that appears in a tech link article that pre-dates the letter from GM.

I did see, on the forum, where that Conti person claimed the larger window in video - but they never said what the source was. Unless something different is produced - I think it probably came from that tech link article - which is came well before the letter from GM.

 

The difference here I think is Tech Article versus Warranty verbiage. In a confrontation I think Warranty would win.

 

I know what you mean. And, I agree with that. But the maintenance requirements do not appear in the Warranty Manual. The Warranty Manual basically refers to the Owner's Manual for maintenance requirements. The warranty manual says: "Damage caused by failure to follow the recommended maintenance schedule intervals and/or failure to use or maintain proper fluids, lubricants, or refrigerants between maintenance intervals recommended in the Owner's Manual is not covered," but it also says "GM cannot deny warranty coverage solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance." My take is that while GM can deny a claim if the failure was caused by lack of maintenance, than cannot deny a claim unless that lack of maintenance actually caused the failure. Of course, if a dealer or GM declares a failure was caused by lack of maintenance, it would be on the owner to challenge that, so its a big risk not to comply with the maintenance schedule in the Owner's Manual.

And that leads in to the other problem - that came up in this thread. The required maintenance schedule itself, in the Owners's Manaul's, with regard to the first DCT filter change, has been a bit of a moving target. It was originally listed in 2020-2023 manuals as being "at 7,500 miles". There was no stated tolerance around the "at 7,500 miles". Owners and dealers had to make up their own acceptable mileage window. Is 1000 miles close enough? There are examples on this forum of dealers telling owners that 4500 miles. It was not until 2024 that the requirement was fully clarified to mean between 7000-8000 miles, even if done earlier. The "even if done earlier" was not previously stated either. So, for all those 2020-2023 owners that do not participate in any forum, they had no knowledge of "clarification". Until mid or late 2024, when GM sent letters to all owners. For many, who followed dealer advice, it was already too late. Given that the Warranty verbiage referred them to their owners manual - that lacked this information - can GM really deny a warranty claim if the get filter changed as soon as they can?

All that said, I agree with you - the verbiage in the tech-link article with the larger window does not appear in anything ever made available to owners by GM, and would not prevail.

 

I bought the car CPO with 3100 miles on it, also paid extra for extended bumper to bumper coverage, including tires and wheels. Filter and fluid change could have already been done. I don't know. But thanks for the info.

 

When I went in for my first engine oil change and transmission filter change, I directed that the GM allowance be placed on the filter change, to my surprise the dealer gives a free engine oil and filter change also so I did not have pay any out-of-pocket expense for my first service. You might have the same option, check with your service advisor.

 

Got my free service in June of 23 with 4100 miles, it's on my dime this time.

 

What model year is your C8, is it a 2025?

I believe that the included maintenance for MY 2025 has changed. My reading of the included maintenance is now limited to only the engine oil and filter (no longer the DCT filter and fluid top off). This service must be completed within the first 12 months or 12,000 miles. This is from the Chevrolet Build and Buy website (under the Warranty Tab).

And FYI, the "Tire Rotation" is swapping the tires left to right and vice versa, NOT front to rear or a cross wise rotation due to the different size tires front and rear...

 

SO mine is a CPO bumper to bumper car with 2 free ones. I wonder if I use a free one if I can get the DTC fluid change at the 3 year mark?

 

Andy believe you are right, signed a Chevrolet Customer Acknowledgment Form at the dealer yesterday upon the purchased of a new 2025 that states the program provides one free oil change within 2 years of ownership and that the transmission external canister must be changed at 7,500 miles. Failure to replace external canister filter can cause damage to transmission and potentially void any warranty. Looks to me like they are separated to me.

 

Can you post that? Does it say anything about the three years? For a 2025. My info comes from two sources. One is the April 2024 bulletin that is official and sent to dealers. The other was something posted by @KenFichtner@LaurelChevy last year for 2024 models. I have noticed, over the years, that the customer acknowledgment forms are not necessarily perfect - they seem to lag keeping up with changes. Way back the combined free service expired in 1 year, but was extended to two years retroactively - and that included me and my 2021. I think it showed up in my warranty tracker fairly quickly, but there other sources that were slow to catch up.

https://static.nhtsa.gov/odi/tsbs/20...00117-0001.pdf
https://www.corvetteforum.com/forums...on-filter.html

 

Does not mention 3 years and I have a copy of the bulletin that states 3 years.

 

Yeah, I was afraid of that. I was wondering if any of the Customer Acknowledgement forms mention the DCT filter change as a free service. Yours mentions the need to change the filter but does not say its a free service. The bulletin says 2024 but does not say beyond. I wonder if it is still included for 2025. Not trying to start a rumor, but does anyone have a 2024 CA form and does it mention both services?

Anyway, the answer is yes, some of the prior forms mentioned the DCT filter change. I capture several from other forum posts. All are Corvette specific - or at least say Corvette up front. See attached examples.

The 2020 version says 1 year (the extension to 2 years happened in 2021 and was retroactive). It does NOT mention the free DCT filter change.
The 2021 version says 1 year (but it was extended to 2 years and was retroactive - it was extended for my 2021). It DOES mention the DCT filter change.
The 2023 version shows 2 years and mentions the DCT filter change.
Your 2025 (already posted above) version shows 2 year and does NOT say the DCT filter change is free, only that it needs to be done.
I do not have a 2024 CA form, but we know that it was split according to the April 2024 bulletin. Did that get reflected in the 2024 form?

So......????