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What is a J-Body?

A "J-Body" or "J-car" is any of General Motors J-platform vehicles. These include:

Buick SkyHawk
Cadillac Cimarron
Chevrolet Cavalier
Oldsmobile Firenza
Pontiac Sunfire, Sunbird and J2000
Toyota Cavalier

All of these vehicles, while appearing distinctly different from each other, share a common frame and body layout.

If you look at the fourth digit of the vehicle identification number (VIN) of any J-Body, you will find the letter "J" (surprise, surprise!).

GM uses a different letter to designate each platform it builds vehicles on, for example:

F: Camaro, Firebird.
N: Grand Am, Malibu, Alero
W: Grand Prix, Impala
Y: Corvette

Contrary to seemingly popular belief in some tuner circles that the J stands for "Junk", according to GM it is merely the platform designation - it doesn't actually stand for anything.

Created: 01-28-2005
Modified: 07-10-2009
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