The W-platform was a General Motors automobile platform which underpinned both mid size and full-size front-wheel drive cars. Originally code named GM10, it began development in 1982 under Chairman Roger B. Smith and debuted in 1988 with the Pontiac Grand Prix, Buick Regal, and Oldsmobile Cutlass Supreme coupés. The four-door sedan version was introduced for 1990.
Class:Mid-size (USA) platform, Full size (E) platform
Body style(s):4-door sedan, 2-door coupe, 2-door convertible
Vehicles:Buick Century, Buick LaCrosse, Buick Regal, Chevrolet Impala, Chevrolet Impala Limited, Chevrolet Lumina, Chevrolet Monte Carlo, Oldsmobile Cutlass Supreme, Oldsmobile Intrigue, Pontiac Grand Prix
Engine(s):122 I4, Iron Duke I4, Quad-4 I4, 60° V6, Shortstar V6, High Value V6, High Feature V6, Buick V6, LS4 V8
Transmission(s):3-speed 3T40 automatic, 4-speed 4T60 automatic, 4-speed 4T60-HD automatic, 4-speed 4T65 automatic, 4-speed 4T60-E automatic, 4-speed 4T65-E automatic, 4-speed 4T65E-HD automatic, 5-speed Getrag 282 manual, 5-speed Getrag 284 Manual, 6-speed 6T70 automatic