did they offer a glove box manual for the 1972 GMC sprint or did GM use the 1972 chevelle one like they did for the 1972 El Camino?

Great question. I looked in some supply mag's and I can't find any reference to a "Sprint" manual. But my gut reaction would be that there must be one. I would find it hard to believe that GMC would use a Chevrolet manual. Even though it is pretty damn close to the exact vehicle.

There are some reproduction company's on the Internet that sell this stuff. You might want to contact them. They deal with this type of question all the time. Try contacting Lloyd'd Automotive Literature (http://www.lloydsautolit.com/)

I'm sure that someone on these forums will get you the correct answer.

good luck