"Bishoop" > wrote in message
...
>I registered my Buick on the GM web site when I purchased it new about
>2-1/2 years ago. I checked the web site today for the very first time
>since registration.
>
> To my surprise they pegged the mileage on the car within 100 miles.
>
> I have the OnStar package but do not subscribe. Are they monitoring the
> mileage via this link or do they have a "very good" algorithm that can
> figure it out. I haven't had the car into the dealer in over six months.

Since you have brought the vehicle into the dealership, as recently as 6
months ago, they can know what mileage you have, then extrapolate 6 months
based on your average accumulation of miles.