5,500 Trans Service
Instructor
Joined: May 2021
Posts: 122
Likes: 64
From: W. PALM BEACH FL
GM sent letters detailing when the trans filter replacement must be and when Trans Fluid change needing to be done either at 45,000 miles or 3 years whichever is 1st. Yes Oil change mileage clock starts at 50 miles then counts down. I meant Invoice Date to dealer not sale date as many dealers have tons of 2025's on lots over a year old and those warranty's are already down a year
Race Director
Joined: Mar 2007
Posts: 11,398
Likes: 8,559
Where did the notice come from? I never received one. While I would assume that it does start on the build date, just to be conservative, I have never seen anything that says exactly when the clock starts. My warranty start date appears to have been when the car was invoiced to the dealer - neither the build date nor the delivery date (not that it proves anything about the start date for the transmission - it just illustrates inconsistency). Others have seen different start dates for their warranty.
Also, according to a GM bulletin about the oil life system (not the transmission fluid), the oil life system has a built in 50 mile delay before the countdown starts. So, at least for oil life it would seem that the clock starts after 50 miles which will typically be after delivery, rather than build date.
I found no similar documentation about the clock start for the transmission fluid replacement.
Also, according to a GM bulletin about the oil life system (not the transmission fluid), the oil life system has a built in 50 mile delay before the countdown starts. So, at least for oil life it would seem that the clock starts after 50 miles which will typically be after delivery, rather than build date.
I found no similar documentation about the clock start for the transmission fluid replacement.
GM sent letters detailing when the trans filter replacement must be and when Trans Fluid change needing to be done either at 45,000 miles or 3 years whichever is 1st. Yes Oil change mileage clock starts at 50 miles then counts down. I meant Invoice Date to dealer not sale date as many dealers have tons of 2025's on lots over a year old and those warranty's are already down a year
Yes, I received the "general" letter from GM last year in 2024 about the transmission service requirements (DTC filter and fluid change requirements). But that letter was general and simply states that the transmission fluid must be changed "every three years at a minimum", without stating when the clock starts. The owners manual is the same way - does not specify when the clock starts.
Race Director
Joined: Aug 2016
Posts: 12,790
Likes: 10,218
From: Garden Valley CA
GM sent letters detailing when the trans filter replacement must be and when Trans Fluid change needing to be done either at 45,000 miles or 3 years whichever is 1st. Yes Oil change mileage clock starts at 50 miles then counts down. I meant Invoice Date to dealer not sale date as many dealers have tons of 2025's on lots over a year old and those warranty's are already down a year
Race Director
Joined: Mar 2007
Posts: 11,398
Likes: 8,559
Yes, according to the warranty manual, which can be downloaded here (for any model year)
https://www.chevrolet.com/support/vehicle/manuals-guide
And here is an example for the 2023:
https://contentdelivery.ext.gm.com/c...24DEC17_3P.pdf
"The warranty period for all coverages begins
on the date the vehicle is first delivered or
put in use and ends at the expiration of the
coverage period."
Mine, however, was activated earlier, more like the invoice date - which was before it was even loaded onto the truck. As noted @RKCRLR had a similar "error" and was able to get it changed.
https://www.chevrolet.com/support/vehicle/manuals-guide
And here is an example for the 2023:
https://contentdelivery.ext.gm.com/c...24DEC17_3P.pdf
"The warranty period for all coverages begins
on the date the vehicle is first delivered or
put in use and ends at the expiration of the
coverage period."
Mine, however, was activated earlier, more like the invoice date - which was before it was even loaded onto the truck. As noted @RKCRLR had a similar "error" and was able to get it changed.
Last edited by Andybump; Jul 6, 2025 at 04:33 PM.
Instructor
Joined: Jul 2014
Posts: 108
Likes: 57
From: Jacksonville Beach Fla
Warranty starts when the dealer RDRs the car using the date you picked up the car. Cars time sitting on lot doesn’t matter. Unless. Dealer punched car RDRd to gain program money. Does happen.
