Depending on how desperate you are to find out how your truck was
really built:
The GM Heritage Center archive has records back to 1977 for Chevy and GMC full size trucks.
http://www.gmmediaarchive.com/?page=1
That service costs $50, but will return to you the actual invoice with RPO content and pricing for your specific truck, per the VIN.
If your vehicle was built in Canada, or built in the US for Canadian use, then GM of Canada would have what you are looking for.
They can be reached at
http://www.vintagevehicleservices.com/options.html
Quote:
Originally Posted by RotaryRocketeer
... but who knows what they would special order for the right amount of money?
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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.