dironvictorious

I have a 2021 that bought last July. The car only had 5 miles on the odometer and all the original interior wrapping. A collector/flipper had bought it and did museum pick-up (enclosed transport) right to his warehouse/garage. I recall the dealer saying the car was an October 2021 build. So, end of model year. Is there site can go to punch in my vin or do i need the dealer to do that?

Kracka

https://www.chevrolet.com/owners

Create a profile, add your VIN, and look at your warranty coverage. The warranty clock starts ticking on the car's in-service date. Or, just ask your service advisor at the dealer.

AzDave47

Just an FYI, the 3 year service is a DCT fluid replacement. The term "hydraulic system flush" is entirely different. The HSF is done with the car running and a computer hooked up to the car and it activates a group of soleniods in the DCT with the DCT fluid circulating inside the transmission (the car is stationary). The HSF does not lose any DCT fluid. It is, however, Step 1 in the service manual for replacing the DCT filter, which does lose some fluid and requires topping up a few ounces of fluid.

The 7500 mile requirement is just replacing the DCT filter. You can save a few $ if you are at 7500 miles +- 500 and also at the 3 year point by having both the HSF done, then change the DCT filter and drain/fill the DCT fluid. Most C8s take 8 or 9 quarts of DCT fluid when drained, not the ~11 quarts that the capacity is listed at.

Vetteman Jack

If all else fails, your dealer can provide you with that info.

thebroz1138

Thanks for the link.
I just checked the service history for my car, and found the information listed to be SHOCKINGLY inadequate!
Here's what's listed for my 7,500 mile DCT filter replacement:
"Service Performed:

• DEXOS LUBE OIL FILTER SYNTHETIC
  
• MISC. SHOP CHARGES
  
• MULTI POINT INSPECTION
  "
  Based on this, I've voided the warranty on my car. I do have the paper receipts, which are somewhat more descriptive of the service performed, but wow!
  
  I had the 22,500 mile DCT filter replacement done:
  "
  
• Service Performed:
  
  • DEXOS LUBE OIL FILTER SYNTHETIC
    
  • MAINTENANCE RATE
    
  • MULTI POINT INSPECTION
    
• Total Cost
  
  $974.68
  
  Damn!
  
  
  

hawk02

The OP is a perfect example of the craziness with this transmission fluid change at 3 years or 45,000 miles whichever comes first requirement.

Here the OP buys a car almost three years old with only 5 miles on the odometer. The engine and transmission aren't even broken in. Yet according to GM's spec, the transmission fluid needs to be changed by the end of the year. And if it's not changed and the OP has a transmission issue, GM could reject any warranty work. That's just crazy. GM or Tremec couldn't come up with fluid that didn't break down just sitting in the transmission?

OP, I would strongly suggest contacting GM about changing the transmission fluid at such low mileage. And if they say it can wait, I would certainly get it in writing. Otherwise plan to play for a transmission fluid change before the end of the year.

dironvictorious

I am going have my dealer confirm and document 1) the in-service date 2) GM recommends the fluid be changed even at only ~4000-5000 miles. I am at 3500 miles right now, but if in service date is original build/delivery date (~Oct 21) will likely be in the 4000-5000 mile range at that point. I guess will then also have to replace the filter again at 7500 miles! likely, next season.

Red Mist Rulz

There's no time-based maintenance requirement on the filter, only 7500 +/- 500 miles. You don't have to change it at 3 years when you do the fluid change. The filter holds about 6 oz of "dirty" fluid. Compared to the 11 liters of total fill, that's not worth worrying about.

Walter Raulerson

Here is the debate when is the in service date 2 people answering GM's 800 number told me that the in service date was when it was serviced by the dealer and put on the lot but I was called a liar and that they didn't know what they were talking about so far all dealers have said it's when the buyer BUYS the car well there you go I found my in service date and it was a week before the dealer said it was. No big deal but if it's months there could be a problem Go on to the chevy sites and look for your car you should be able to find when the car was put into service

Andybump

Regarding the requirement to replace the fluid at three years:


@Steve Garrett of Corvette Today asked Josh Holder, the Corvette Chief Engineer about this in a follow up to the recent bash. Speaking for myself, if I bought a car that had sat for three years, I would be wanting to change out the fluids. There's probably a conservative margin built into the recommended interval, so the additive is still effective at three years. The idea is to replace it while the additive is still effective, not after it has deteriorated. No way I would want to go another three years before changing it out. The Delco bottle itself has two curious statements - one to shake up the bottle before putting it into the transmission, and the other being a three year shelf life. Anyway, here is what was said:

Question 9 from the original thread: why is DCT fluid Titan FFL-4 change interval DATE-BASED at all?

Josh Holder: .... "The fluid needs to be changed after 3 years because the anti-foaming agents will break down and the fluid will absorb some moisture. All service recommendations are for good reason ."