[aharper33]

I do, and the the answer is "whatever has already been previously built and validated".

GM will not build onsie-twosie combinations without already knowing that they can go down the line without causing problems and without knowing that combination will meet the life expectancy of the vehicle without causing legal repercussions or regulatory issues. That development/validation cost would run multiple millions of dollars, which is (normally) prohibitive for an individual or a single vehicle. It would not be a good business case to build two or three dev/val engineering vehicles in order to sell one or two saleable production vehicles in that configuration.*

You can also tell (sometimes) by the assembly information. For example, if you told me your vehicle was built in Flint then I could tell you that the rear axle was not factory because Flint Assembly could not accommodate the build of dual rear wheel vehicles through their process.


K

*although I do recall that one model year we built a quantity of "one" production vehicle of a particular V6 combination - and it was the EPA test certification vehicle.[/QUOTE]

Along those lines, was there a minimum number that was required to make these " one off" vehicles? It seems like there are alot of cars you see on the Mecum Auctions, and Barrett Jackson that are one off combinations. Not saying this is one of them but more of a question.