General Motors has embraced the sharing of automobile platforms globally, although the company currently uses the term, architecture rather than platform.

Traditionally, GM platforms were long-running vehicle families aimed at similar market niches. For example, the E-body Oldsmobile Toronado lasted through four generations from 1966 through 1992, but retained the same name throughout. Customers began to use the platform names as well. For example, many economy car owners called their cars J-bodies rather than the multitude of different names used by the various GM divisions.

In some cases, the name was retained for a market segment even while the architecture diverged radically. In 1982, the A-body switched from rear- to front-wheel drive. The former chassis continued, now with the G-body name, while the new A-body was all-new.

Current platforms

Current GM platforms:

• Gamma - subcompact FWD
• Delta - compact FWD
• Epsilon - mid-size FWD
• Kappa - compact RWD
• W - midsize cars FWD
• G - fullsize cars FWD
• Sigma - full-size RWD
• Theta - crossover SUV AWD
• Lambda - minivan FWD/AWD
• Zeta - mid-size RWD
• Y - sports cars RWD

Historical platforms

As mentioned above, GM used platforms to make a heirarchy of models aimed at different market segments. The following table attempts to place each shared platform in context.

Front wheel drive

Rear wheel drive

GM re-used some platform names between the front- and rear-wheel drive families.

Others

GM also has a number of non-shared and international platforms:

• GM V platform - Holden Commodore
• GM Z platform - Saturn S-series

And the company has used the platform name for badge-engineered and non-GM products:

• GM M platform (Suzuki) - Chevrolet Sprint, Geo Metro
• GM P platform (Isuzu) - Chevrolet Spectrum, Geo Storm
• GM S platform (Toyota) - Chevrolet Nova, Geo Prizm
• GM T platform (Daewoo) - Pontiac Le Mans