Frequently Asked Questions

C8Tracker started as a way to automate the manual tracking people were doing with Corvette window stickers. It grew from daily production tracking into dealer data and other tools that can help future Corvette buyers understand production and allocation activity.

GM makes window-sticker PDFs available for new vehicles. C8Tracker downloads those publicly available stickers, extracts the vehicle information and presents it in a way that is easier to search and analyze.

No. C8Tracker is a private effort and is not affiliated with General Motors, Chevrolet, or any dealer. The site does not rely on dealer or GM insiders for its production data.

The records come from individual vehicle window stickers, so the available data is highly reliable for the markets covered. The important limitation is that the window-sticker source covers US- and Canada-bound vehicles rather than every global-market Corvette.

The data is updated every day using automated scans.

• Tuesday–Saturday: Daily updates start around 12pm EST and continue until around 7pm EST.
• Sunday: Stingray and Grand Sports data gets an additional scan.
• Monday: Z06, ZR1, and ZR1X data gets an additional scan.

While the cars go down the assembly line in sequential VIN order, the window stickers are not necessarily released in sequential order.

We don't have any way to know why this happens, but the commonly held belief that that some cars get held up in some sort of quality control check. Some people believe that ever car gets checked and the only cars that get held up had issues, while other people believe that only a percentage of cars get pulled for some sort of quality control check. It is believed that when these quality control checks (and any needed fixes) are complete, the car is then invoiced to the dealer and the window sticker is available the next day. This process can take up to several weeks, so this is why most people believe there is a delay in some window stickers getting released. It sounds plausible and we have verified it in some cases where we were in touch with the person buying that particular car, but we have no way to verify if this is the reason for every delayed window sticker.

These 'missing' VINs will be added as soon as the window stickers are available. They will be reflected in the production numbers for the day the window sticker was made available.

Since we pull the data from the window stickers, we have to download all of the window stickers. This is just a process. We also try to do this in a way that is ethical and won't have any negative impacts on the website we download the window stickers from. So we throttle our requests to that site (ie, we slow them down and space them out in effort to not be disruptive). So the updates take some time.

Our production numbers are accurate, as are some of the other sources out there. They are basically measuring production at different times.

The other sources basically show the VIN range for the cars that went down the assembly line on a given day. This is a valid way to measure production, but it can't account for cars that get held up in quality control. It's still great data to have available, so a big thank you to the people who provide it.

Since our data relies on window stickers, it won't show every car that went down the production line the day before because the window stickers for some cars could get delayed. Our numbers are better described as showing how many cars have been built and are ready to get shipped to a dealer (as the cars have cleared quality control and been invoiced to the dealer). However, the window stickers only include US and Canada bound cars, so the numbers will always be slightly less.

Which data is better? It doesn't really matter, take your pick. While the numbers vary slightly day to day, the weekly and monthly trends tell the same story.