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So... If I move my scheduled DCT filter service from September up to May so I can accomplish it's replacement once more and at 7500 miles...and...I elect (as planned) to do my 3 year DCT fluid change at the same time, which would be 2 years 8 months, will I have to do the fluid change again at the 3 year mark? Using this forum gurus' thinking it would seem to be true. When does it all end!?!?
Thanks Dave. But I appear to be in a unique situation. I have always changed oil in all my cars at 3000-5000 miles and always gotten 200k out of the cars without major repairs. So when I took the Corvette into the Chevy dealer at 5200 miles they changed the oil and inspected the car. No charge. There was no filter change at that time and now I have the warning on the dash and am taking it in for service Wednesday. My position is clear. You promised me, in writing, that you would install a dct filter for free. I am here for the promised service, for free.
Bill
Who promised you a free DCT filter change? Not GM.
GM's wording very clearly states one free service before 2 years or 7500 miles. That neither you nor, apparently, the dealer actually read GM's customer care documentation doesn't obligate GM to provide two free services. That the dealer failed to inform you of that maybe gives you some claim against the dealer.
The answer is yes, you will still receive a free DCT filter change.
Originally Posted by stevesvette
Thanks, appreciate your response.
If stevesvette got the first "free" service from the dealer without a DCT filter change, GM is under no obligation to provide a second free service on the filter. GM's language very clearly states ONE included service within the first year (later changed to first two years). Not one free oil / filter change and one free DCTfilter change.
You seem to have clear picture of this. The problem arises when folks that drive low miles have the filter changed early because the free service is about to expire. So, these are not unreasonable examples. At each of the following miles for the first filter change, what is your suggestion for the second filter change:
If the first filter change is at 1500 miles the next filter change should be ........
If the first filter change is at 2500 miles the next filter change should be ........
If the first filter change is at 4500 miles the next filter change should be ........
If the first filter change is at 6000 miles the next filter change should be ........
If the first filter change is at 7500 miles the next filter change should be at 30000 miles. (22500 miles later)
This is exactly what GM should revise the TSB to state.
According to some it is:
If the first filter change is at 1500 miles the next filter change should be 7500.
If the first filter change is at 2500 miles the next filter change should be 7500.
If the first filter change is at 4500 miles the next filter change should be 7500.
If the first filter change is at 6000 miles the next filter change should be 7500.
If the first filter change is at 7500 miles the next filter change should be at 30000 miles. (22500 miles later)
Bill: Go on the Chevy owners site and click on your car’s service history. Look up the service where the dealer only changed the engine oil & filter. It will show the total charge. If it shows $285 the dealer got reimbursed for not only the engine oil & filter but also the DCT filter.
And yet there is a not a single piece of documentation from GM that supports this interpretation.
It's also contradicted by your own service manual.
Bad advice.
you must be a lot of fun at a party
ive had 3 transmissions installed under warranty in my 2020 corvette now at 22k miles
thanks for your interpretations.
id like to see the legal standing of the zone rep trying to tell me my transmission warranty is voided because I changed the filter on the third transmission in this car at 6300 miles instead of 7500 miles as stated in the supposedly Holly grail owners manual since the installation and that’s the reason the transmission failed a forth time and GM isn’t responsible.
every time I had previously happily drove in just fine , then the dealerships changed the filter and the transmission took a dump
use common sense and just change the filter and fluid around the required time and mileage requirement.
So... If I move my scheduled DCT filter service from September up to May so I can accomplish it's replacement once more and at 7500 miles...and...I elect (as planned) to do my 3 year DCT fluid change at the same time, which would be 2 years 8 months, will I have to do the fluid change again at the 3 year mark? Using this forum gurus' thinking it would seem to be true. When does it all end!?!?
Nice question. But the wording for the transmission fluid change requirements is different - in the 2023 Manual, at 45000 miles, or when the fluid life monitor says to, or at least every three years. Its not the same mechanism at the first DCT filter change. In the case of the DCT filter, there is, according to GM, additional Break-in wear debris that accumulate during the entire 7500 mile break in period. So if changed early, there is still extra wear in debris accumulating - and the goal is to change the filter after that is complete (and not before). All of the other requirements are in terms of "every" or "at least" or miles or time since last performed. The DCT filter change requirement is unique in that regard.
the others on the forum are being **** and ridiculous.
Thanks but the only perfect situation with no interpretation is if:
You reach 7500 miles end year one and you'll be changing engine oil and DCT filter (with flush.)
Or if you think you will reach 7500 miles close to end year 2 and can change the DCT filter before the 2 year Max for Free ends.
I saw:
That regardless of miles had to replace the 11 quarts of DCT fluid year 3.
A number of folks posted having early DCT CELs. When the dealer read the CEL failure code to GM Service they were told to perform a flush (not a DCT filter charge in most a cases just a flush.) That takes about 10 minutes with the car connected to the GM Service Computer and engine running. It cycles the many valves and actuators that control shift fork movement for the 8 gears and whatever. Thought, prudent to have that flush done year one as it's required before a DCT filter change. So when the OLM said change engine oil at 12 months and ~3000 miles had both done on GM's dime.
GM also acknowledged Tremec found some transmission shafts that were not sufficiently clean prior to being installed.
Also could feel a slight jerkiness when driving at very slow speed as I crawled into my garage. I try, as now, to keep the driver's mirror tip to door wood molding gap about an inch, which assures the harder to judge passenger mirror, has plenty of clarence. After ~1000 miles, as now, it was perfectly smooth. So there was some initial wear on that slipping 1st gear clutch. Has to slip up to ~ 4 mph or the engine would stall!
Knew year 3 with the 11 quarts of fluid change I would install another new filter. That would be ~two years on the 1st new filter. Would also not have ~7 oz of old fluid and old filter left with that 11 quarts of new fluid. Not a big deal as it's a small percentage but better all new.
Not exactly when the C8 has 7500 miles BUT about when that 1st year filter will have about 7000 miles.
When I posted an old pic from my file in this Thread I saw one of the GM recommendations I had not noticed. I clearly says perform the 1st maintenance when the Driver's Information Center indicates to change oil. Can't miss those messages that start at about 10% Oil Life Left and say change oil soon. You have to press OK to get rid of message. It continues to post that message every time to start the car, Recall I was down to 5% when I had it done. It will decrease with time change 1/12 per month, or 8%.
It also says clearly, Dual-Clutch Transmission filter MUST be changed during the FIRST oil change! Frankly used that GM Pic for the 0.2 Liter (~7 oz) info back in 2020. Put pic below of where the oil level check plug was located.
Highly doubt I would have an issue with my interpretation of change DCT at 7500 miles BUT just in case could use that pic!
So... If I move my scheduled DCT filter service from September up to May so I can accomplish it's replacement once more and at 7500 miles...and...I elect (as planned) to do my 3 year DCT fluid change at the same time, which would be 2 years 8 months, will I have to do the fluid change again at the 3 year mark? Using this forum gurus' thinking it would seem to be true. When does it all end!?!?
no
just follow
and adjust the future changes by mileage and time for future transmission service.
Thanks but the only perfect situation with no interpretation is if:
You reach 7500 miles end year one and you'll be changing engine oil and DCT filter (with flush.)
Or if you think you will reach 7500 miles close to end year 2 and can change the DCT filter before the 2 year Max for Free ends.
I saw:
That regardless of miles had to replace the 11 quarts of DCT fluid year 3.
A number of folks posted having early DCT CELs. When the dealer read the CEL failure code to GM Service they were told to perform a flush (not a DCT filter charge in most a cases just a flush.) That takes about 10 minutes with the car connected to the GM Service Computer and engine running. It cycles the many valves and actuators that control shift fork movement for the 8 gears and whatever. Thought, prudent to have that flush done year one as it's required before a DCT filter change. So when the OLM said change engine oil at 12 months and ~3000 miles had both done on GM's dime.
GM also acknowledged Tremec found some transmission shafts that were not sufficiently clean prior to being installed.
Also could feel a slight jerkiness when driving at very slow speed as I crawled into my garage. I try, as now, to keep the driver's mirror tip to door wood molding gap about an inch, which assures the harder to judge passenger mirror, has plenty of clarence. After ~1000 miles, as now, it was perfectly smooth. So there was some initial wear on that slipping 1st gear clutch. Has to slip up to ~ 4 mph or the engine would stall!
Knew year 3 with the 11 quarts of fluid change I would install another new filter. That would be ~two years on the 1st new filter. Would also not have ~7 oz of old fluid and old filter left with that 11 quarts of new fluid. Not a big deal as it's a small percentage but better all new.
Not exactly when the C8 has 7500 miles BUT about when that 1st year filter will have about 7000 miles.
When I posted an old pic from my file in this Thread I saw one of the GM recommendations I had not noticed. I clearly says perform the 1st maintenance when the Driver's Information Center indicates to change oil. Can't miss those messages that start at about 10% Oil Life Left and say change oil soon. You have to press OK to get rid of message. It continues to post that message every time to start the car, Recall I was down to 5% when I had it done. It will decrease with time change 1/12 per month, or 8%.
It also says clearly, Dual-Clutch Transmission filter MUST be changed during the FIRST oil change! Frankly used that GM Pic for the 0.2 Liter (~7 oz) info back in 2020. Put pic below of where the oil level check plug was located.
Highly doubt I would have an issue with my interpretation of change DCT at 7500 miles BUT just in case could use that pic!
thanks Jerry
thats exactly what I did.
the engine oil change
light came on at 6300 miles and I called the service department to service the engine oil change and at the same time did the transmission filter change on my last service.
I guess 7500 miles isn’t written in stone as many here would like to suggest.
thanks for posting that photo and that information up.
When I posted an old pic from my file in this Thread I saw one of the GM recommendations I had not noticed. I clearly says perform the 1st maintenance when the Driver's Information Center indicates to change oil. Can't miss those messages that start at about 10% Oil Life Left and say change oil soon. You have to press OK to get rid of message. It continues to post that message every time to start the car, Recall I was down to 5% when I had it done. It will decrease with time change 1/12 per month, or 8%.
It also says clearly, Dual-Clutch Transmission filter MUST be changed during the FIRST oil change! Frankly used that GM Pic for the 0.2Liter (~7 oz) info back in 2020. Put pic below of where the oil level check plug was located.
Highly doubt I would have an issue with my interpretation of change DCT at 7500 miles BUT just in case could use that pic!
So it appears that those of us with 2020's that changed the DCT filter when the DIC indicated to change the engine oil (regardless of mileage) are OK not to change the DCT filter again for another 22,500 miles since the 2020 manual also does not include the note below:
Correct? I mean, if you interpret all these requirements literally....
the others on the forum are being **** and ridiculous.
No, the others on the forum are telling people what GM, the people who built the car and make warranty decisions, said you should do.
GM isn't going to care when you tell them "The guys on Corvette Forum said I didn't have to change it at 7500 if I change it early." If you think following GM's warranty requirements, which say you need to follow the recommended service schedule, is "****," that's up to you I guess.
So it appears that those of us with 2020's that changed the DCT filter when the DIC indicated to change the engine oil (regardless of mileage) are OK not to change the DCT filter again for another 22,500 miles since the 2020 manual also does not include the note below:
Correct? I mean, if you interpret all these requirements literally....
it’s not an additional 22500 miles from the first transmission filter change.
its 15000 miles additional from the first filter change and that’s according to the GM service rep who texted me their answers so I have it in writing but to be on the safe side changing the filter again at only an additional 7500 miles wouldn’t be the worst thing.
I have had 3 transmissions in my c8 and it’s not really fun.
better to be overly cautious and not miss the mileage between changes as written in the owners manual.
after my transmission experience Id rather error on the side of caution
for the few dollars it costs for service stay properly within the mileage and time difference between change intervals
its not as I stated 22500 more after the first filter change. It’s 15000 miles after the first filter change according to the GM rep that texted me this information
it’s not an additional 22500 miles from the first transmission filter change.
its 15000 miles additional from the first filter change and that’s according to the GM service rep who texted me their answers so I have it in writing but to be on the safe side changing the filter again at only an additional 7500 miles wouldn’t be the worst thing.
I have had 3 transmissions in my c8 and it’s not really fun.
better to be overly cautious and not miss the mileage between changes as written in the owners manual.
after my transmission experience Id rather error on the side of caution
for the few dollars it costs for service stay properly within the mileage and time difference between change intervals
its not as I stated 22500 more after the first filter change. It’s 15000 miles after the first filter change according to the GM rep that texted me this information
Most people would interpret the statement "every 22,500 miles thereafter" as an additional 22,500 miles after the first service was performed.
The mileage from the first transmission filter change to the second is 15000 miles. It is the third filter change in the manual that then goes to an interval change at 22500 miles
so
for round numbers if you changed your filter at 5000 miles on the odometer. You then change the second filter at 20k miles on the odometer and then change the filter again at 42500 miles
if you are having the 3 year fluid change change the $127 filter at that time as well. Then go 22500 miles from that mileage point and you are good to go according to the GM rep who wrote instructions to me.
Obviously if you changed the filter at say 3k miles like Jerry U it is smart to drive no more than another 7500 miles before changing the filter and in his case the fluid at 10500 miles.(as his 3 year fluid change was imminent and he changed his first filter so early)
So... If I move my scheduled DCT filter service from September up to May so I can accomplish it's replacement once more and at 7500 miles...and...I elect (as planned) to do my 3 year DCT fluid change at the same time, which would be 2 years 8 months, will I have to do the fluid change again at the 3 year mark? Using this forum gurus' thinking it would seem to be true. When does it all end!?!?
What does your manual say?
This has zero to do with forum advice. Follow the written manual not somebody's personal opinion on these forums.
Apparently some forum gurus have their own advice and interpretation
the engine oil change
light came on at 6300 miles and I called the service department to service the engine oil change and at the same time did the transmission filter change on my last service.
I guess 7500 miles isn’t written in stone as many here would like to suggest.
thanks for posting that photo and that information up.
? It's written in your manual not in stone. If you elected to allow your dealership to change your DCT filter early thats your personal choice but has nothing to do with anything "written in stone" or in the manual.
Transmission filters change intervals are also dependent on usage. These are not written in stone mileage requirements. If the owners manual states to change the filter at the first oil change when the monitor light comes on to do so. The owners manual also stated to change the transmission filter.
how come you ignore that written part of the owners manual as you keep repeating exactly at 7500 miles for the filter change?
you can’t have it both ways to annoy people.
GM isn’t looking to screw people if the vehicle breaks.
just use common sense and you’ll be fine.
(edit) GM warranty was excellent in their effort to replace my cars transmission when it stopped working not once but twice)
those new to GM vehicles GM is driven to deliver excellence.
(Humor)
Im handsome and charming but that’s not why GM delivered excellence in
my situation.(end of humor)
They do it for everyone so their reputation stays as is or is improved if that’s even possible.
call them up. Get the answer from the horses mouth in a text , screen shot the directions their customer service rep gives you and follow their instructions
that’s my advice, that’s my experience, that’s my opinion.
how
much better can you get than getting it in writing from the GM representative.
Last edited by JerriVette; Mar 11, 2023 at 07:11 PM.
This has zero to do with forum advice. Follow the written manual not somebody's personal opinion on these forums.
Apparently some forum gurus have their own advice and interpretation
My 2020 manual has a service table showing the first DCT filter service at 7500 miles (and a footnote stating to change the DCT filter at 7500 miles) without a tolerance on the 7500 mile interval. Since there was no tolerance on the interval I contacted a GM Customer Car Specialist for clarification and was told that if I changed my filter at 4600 miles I was good until the next service interval. So I've changed my DCT filter per the manual incorporating the clarification from the GM specialist about the omitted tolerance on the service interval in the manual.
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