If you have ever wondered what an F-body is, or any of the other codes for GM Body designations, the following is a list of the platform designations used by General Motors for most cars built over the last several decades.

PASSENGER CARS:
A = Cutlass Ciera, Cutlass Cruiser Wagon, Century
B = Caprice/Impala SS, Custom Cruiser Wagon, Roadmaster
C = Ninety Eight, Park Avenue
D = Fleetwood
E = Toronado, Riviera ('93-'94), Eldorado
F = Camaro, Firebird
G = Aurora, Riviera ('95+)
H = Bonneville, Eighty Eight, LeSabre
J = Cavalier, Sunbird/Sunfire
K = Seville, Deville
L = Corsica, Beretta
M = Metro
N = Grand Am, Achieva, Skylark
R = Storm
S = Prizm
U = Lumina APV, Trans Sport, Silhouette
W = Lumina/Monte Carlo, Grand Prix, Cutlass Supreme, Regal
Y = Corvette
Z = Saturn

TRUCK PLATFORMS:
S/T = small pickup/utility
C/K = fullsize/utility
M = medium van
G = large van/medium-duty truck

PREVIOUS PLATFORMS:
H = Monza, Skyhawk, Starfire
P = Fiero
V = Allante
X = Nova/Citation, Apollo/Skylark, Ventura, Phoenix