General Motors G platform (1995)

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Main article: GM G platform
GM G platform (FWD)
File:Oldsmobile-Aurora.jpg
Overview
Manufacturer General Motors
Also called G-Body
Production 1995–2011
Body and chassis
Class Full-size
Body style(s) 4-door sedan
2-door coupe
Related GM C platform (FWD)
GM H platform (FWD)
GM K platform (FWD)
Chronology
Predecessor GM C platform
Successor GM Epsilon platform

The General Motors G platform (also called G-Body) automobile platform designation was used for front-wheel drive full-sized luxury cars between 1995 and 2011.

Previously General Motors used the GM G platform (RWD) designation for unrelated mid-sized cars.

The G-body (the GMX690) was based on Cadillac's K-body architecture. The Buick Riviera 2-door coupe moved up from the GM E platform, while the Oldsmobile Aurora 4-door sedan was a new model.

Platform consolidation

Starting with the 1997 Buick Park Avenue, GM consolidated its four large-car platforms; C platform, K platform, H platform, and G platform; all to the G platform. However, GM decided to retain their previous platform designations.[1] These legacy platform designations were used in the VIN number and official GM publications. Models designated as "G" went out of production for MY 1999, but successor models were sold until MY 2011.

The G-body had an extremely resilient structure. For its time, the G-body was one of the strongest unibody car frames in production (25 Hz). This fact did not go untouted as GM literature made light of the need to use a 'frame crusher' designed to test heavy-duty truck frames to finally break the G-body structure in their crush-to-failure procedures. Vehicles built on the G platform are also noted for having belt-in-seat style seat belts like the mid-size GMT360 SUVs.[citation needed] The G-body also featured four-wheel independent suspension with a MacPherson strut style front suspension and a semi-trailing arm style rear suspension that utilized aluminum control arms. All-new aluminum control arms were introduced for the front suspension for 1998.[citation needed] The handling was further enhanced with standard front and rear stabilizer bars and lateral links in the rear suspension to further control wheel toe.[citation needed]

Vehicles

File:1999 Buick Riviera.jpg
1999 Buick Riviera
Years Wheelbase Model Platform Name*
1995–1999 113.8 in Buick Riviera GM G platform
1995–1999 113.8 in Oldsmobile Aurora GM G platform
1997-2005 113.8 in Buick Park Avenue GM C platform
1998–2004 112.2 in Cadillac Seville GM K platform
2000–2005 112.2 in Buick Lesabre GM H platform
2000–2005 112.2 in Pontiac Bonneville GM H platform
2001–2003 112.2 in Oldsmobile Aurora GM G platform
2000–2005 115.3 in Cadillac DeVille GM K platform

* Official designation given by GM, despite using a G platform-derivative. This name also corresponds to the 4th letter in the VIN of the vehicle.

Revision

The G platform was updated for the 2006 model year.[2] The final car on this platform was the Buick Lucerne, which ended production in June 2011.[3]

Vehicles

File:Buick-Lucerne.jpg
2006 Buick Lucerne
Years Wheelbase Model Platform Name*
2006–2011 115.6 in Cadillac DTS GM K platform
2006–2011 115.6 in Buick Lucerne GM H platform

* Official designation given by GM, despite using a G platform-derivative. This name also corresponds to the 4th letter in the VIN of the vehicle.

References

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