Those are only good for the VIN listed on the card. You get them if you have a Pontiac, Hummer or Saturn. Or if your selling dealer was one of the "wind down" dealerships that GM yanked the franchises from.
I got one for my Bonneville last year. I called the dealership and asked what kind of oil change. Of course, it was the basic with non-synthetic oil. I asked about the cost difference to go synthetic. The service manager told me that I could bring in my own oil and they would fill it with that for no charge. So, I was off to Walmart for a $24 jug of Mobil 1. I only used two of the oil changes, but it was nice to get them done for only the cost of the oil.
Took my car in and they did the oil change and afterward imformed me that the vin didn't match. They let it slide but when I got home I called G.M. Come to find out the card was for my 1991 Olds 98 that I haven't had in about 10 years and for a car company that isn't even in business nor has it been for a few years now. They said they would send it through and try and get it updated to my NOx.
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