Buick
In 1984, Buick was the official car of the XXIII Olympiad. A reorganization split manufacturing & engineering from sales and marketing. The first pilot Buick is produced at "Buick City", a state-of-the art assembly center built inside the walls of Buick's home plant at Flint. Buick had its best model year sales to date with 906,626 vehicles sold plus Buick worldwide sales topped one million for the first time. To close out 1984, Lloyd Reuss ended his tenure as general manager of the Buick Motor Division.
Buick V6 engine
One quick idea was tried by Buick engineers — taking an old Fireball V6 picked up at a junkyard and installing it into a 1974 Buick Apollo. The solution worked so well that GM wanted AMC to put the engine back into production. However, AMC's cost per unit was deemed as too high. Instead of buying completed engines, GM made an offer to buy back the tooling and manufacturing line from AMC in April, 1974, and began building the engines on August 12. With production back within GM, Buick re-introduced the V6 that fall in certain 1975 models — a move made possible by the fact that foundations for the old V6 machinery were still intact at Buick's engine assembly plant in Flint, Michigan, so it was easy to put the old tooling back in place and begin production at least two years ahead of the normal schedule that would have been required to create new tooling. The bore was enlarged to , identical to the Buick 350 and Olds 307 V8s, yielding displacement. 78,349 231s were installed in Buicks for 1975.