W-body
Overview
Manufacturer	General Motors
Also called	GM10
Production	1987–2016
Body and chassis
Class	Mid-sizeplatform Full sizeplatform
Layout	FF layout
Body style(s)	4-doorsedan 2-doorcoupe 2-doorconvertible
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
Powertrain
Engine(s)	122I4 Iron Duke I4 Quad-4 I4 60°V6 Shortstar V6 High Value V6 High Feature V6 Buick V6 LS4V8
Transmission(s)	3-speed3T40automatic 4-speed4T60 automatic 4-speed4T60-HD automatic 4-speed4T65 automatic 4-speed4T60-E automatic 4-speed4T65-E automatic 4-speed4T65E-HD automatic 5-speedGetrag 282manual 5-speed Getrag 284 Manual 6-speed6T70 automatic
Dimensions
Wheelbase	107.5 in (2,730 mm) 109.0 in (2,769 mm) 110.5 in (2,807 mm)
Chronology
Predecessor	GM G platform (RWD) GM A platform (FWD) GM B platform
Successor	GM Epsilon Wide II LWB platform GM Zeta platform (forChevrolet SS for FWD Impala SS)

TheW-platform (also known as theW-body) was aGeneral Motorsautomotive platform underpinning bothmid size andfull-sizefront-wheel drive cars — across the platform's three generations from 1987-2016.

Code namedGM10, the program began development in 1982 under ChairmanRoger B. Smith and debuted in 1987 with thePontiac Grand Prix,Buick Regal, andOldsmobile Cutlass Supremecoupés — with the four-doorsedan body style introduced for 1990.

The 1997–2005 2nd Generation, orW2 Platform, used both a 110.5 in full-size wheelbase as well as a 109 in mid-size wheelbase.

From 2005-2016, theW3 Platform used a 110.5 in, full-size wheelbase in sedan and coupe configurations, including for thePontiac Grand Prix (2004-2008),Buick LaCrosse/Allure (2005-2009),Chevrolet Impala/Impala Limited (2005-2016) andChevrolet Monte Carlo (2000-2007) — each with high performance V8 variants.

The platform cost $7 billion to develop, with engineering executed by the Chevrolet-Pontiac-Canada (CPC) group; also known as the small car division. The original program was intended to replace all midsize cars produced byChevrolet,Pontiac,Oldsmobile, andBuick on theG andA platforms. This ultimately did not happen; while the A-platformChevrolet Celebrity andPontiac 6000 were quickly discontinued, the A-bodyBuick Century andOldsmobile Cutlass Ciera remained in production until 1996.

The plan was for seven GM plants that would each assemble 250,000 of the cars, or 21% of the total U.S. car market.^[1] It was badly executed from the start, but GM's 1984 reorganization, combined with changing market dynamics, wrought havoc with the program and it never recovered. In 2008, prominentshareholder activistRobert A. G. Monks noted that GM had lost $2000 on every car it produced in 1989, the year before the last of the original GM10's were launched.^[2]

The next iteration of the platform was known as theMS2000 or simply theW2 platform. Early versions used a transversely installed, fiberglass mono-leaf spring combined with struts in the rear. The "generation 1.5" W-body models had updated rear suspensions that used coil springs instead of the transverse leaf spring design inspired by theChevrolet Corvette. For the 1997 model year the second generation W-body was released with a MacPherson strut coil spring design.

A revised and updatedW3 platform was introduced in 2004, rather than a stretchedEpsilon platform, as had been planned.Parma Metal Fabricating Division of Parma, Ohio was responsible for metal fabrication and final assembly took place at GM'sOshawa Car Assembly. Thetransverse use of GM'sLS small-block engine in the W-bodies was a major addition for 2005.

The GM W Platform was phased out with the production of the new long-wheelbaseEpsilon II platform. The last car produced on the W platform was the ninth generation of theChevrolet Impala, which was replaced by the Epsilon-based tenth-generation Impala, beginning in model year 2014. GM continued to produce the W-body Impala to fleet customers only under the name Impala Limited until production ended in May 2016.^[3]

Vehicles using the W-body platform include:

• 1st Gen 107.5 in wheelbase (mid-size)
  • 1988–1996Buick Regal (2-door coupe, 4-door sedan)
  • 1988–1997Oldsmobile Cutlass Supreme (2-door coupe, 2-door convertible, 4-door sedan)
  • 1988–1996Pontiac Grand Prix (2-door coupe, 4-door sedan)
  • 1990–1994Chevrolet Lumina (2-door coupe, 4-door sedan)
• 1.5 Gen 107.5 in wheelbase (mid-size)
  • 1995–2001Chevrolet Lumina (4-door sedan)
  • 1995–1999Chevrolet Monte Carlo (2-door coupe)
• 2nd Gen 109 in wheelbase (mid-size)
  • 1997–2005Buick Century (4-door sedan)
  • 1997–2004Buick Regal (4-door sedan)
  • 1998–2002Oldsmobile Intrigue (4-door sedan)
• 2nd Gen 110.5 in wheelbase (full-size)
  • 1997–2003Pontiac Grand Prix (2-door coupe, 4-door sedan)
  • 2000–2005Chevrolet Impala (4-door sedan)
  • 2000–2005Chevrolet Monte Carlo (2-door coupe)
• 3rd gen 110.5 in wheelbase (full-size)
  • 2004–2008Pontiac Grand Prix (4-door sedan)
  • 2005–2009Buick LaCrosse/Allure (4-door sedan)
  • 2006–2016Chevrolet Impala/Impala Limited^[4][5] (4-door sedan)
  • 2006–2007Chevrolet Monte Carlo (2-door coupe)

• General Motors platforms

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• Short description is different from Wikidata