Looking for a lost car.

My wife's father had a Cutlass before he passed away and it was her favorite car that he had. I have the VIN but unknown where the car maybe at now as it was sold after her passed. Would anyone have any ideas on how I can find this car? The VIN is 336871M131697. With it being only 13 characters everywhere I enter the VIN it says invalid.

It looks like you are looking for a 1971 Cutlass that was built in Lansing. Without the exact vin, I doubt you'll be able to find the original one but you should be able to find something close if that works.