List of GM platforms Article

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This List of GM platforms contains automobile platform used both at present and historically by General Motors.

Originally, GM used a Latin alphabet letter scheme to name its platforms, which were aimed at vehicle families in similar market niches. For example, the E platform Oldsmobile Toronado personal luxury coupe was redesigned significantly through four generations from 1966 through 1992, but retained the same letter designation throughout that time. During that span the vehicle grew from its original 211" as large as 220" then shrank to 188", and shifted from traditional body-on-frame construction to unibody, with the platform changing but not its designation.

In some cases an entirely new platform was developed but given the name of an existing one for marketing reasons, with the original being assigned a new designation. For example, in 1982, a ground-up front-wheel drive GM A platform (1982) was designed, with former rear-wheel drive GM A platform (1936) vehicles shifted over to it. However, the original A platform rear-wheel drive architecture remained in production, re-designated as the GM G platform. In certain instances, GM has used varied letter designations for similar products. The recent front-wheel drive G, H, and K architectures are reported to be closely related, but GM has given different letter designations based upon the model produced upon the architecture.

In modern General Motors parlance, each platform is referred to as an architecture. Beginning in the 2000s, GM instituted a naming scheme for its global automotive architectures using the English-language names of letters of the Greek alphabet, for example, "Alpha." Despite this change in naming convention, many vehicles are still produced on platforms using the older, Latin letter-designated naming scheme. Often these are informally referred to by their letter name and the term "-body", as in the GM "A-body".

For the Latin alphabet letter platforms, the architecture designation usually corresponds to the 4th letter of the Vehicle Identification Number. GM used these letter designations to identify service manuals, owner manuals, and other publications. It is common for the automotive press to describe visually similar car families based on their platform designation. (For example, the "X Cars".)

In production

Cars

Trucks and SUVs

GM platform nomenclature guide

The GM nomenclature works as follows:
1st position is the platform:

  • A – Alpha
  • C – Chi
  • D – Delta
  • G – Gamma
  • E – Epsilon
  • P – Premium Epsilon (XTS)
  • Y – Corvette (Y-body)
  • L – Lambda
  • K – Trucks


2nd position is the platform generation.
3rd position is the body style:

  • A – Convertible
  • B – Coupe
  • S – Sedan
  • J – Hatchback
  • K – CUV?
  • L – Long Wheel Base Sedan
  • M – Minispace
  • U – Crossover/CUV (5 seater)
  • Y – SUV/Truck (7 seater)


4th position is the Brand:

  • B – Buick
  • C – Chevrolet
  • G – GMC
  • H – Holden
  • L – Cadillac
  • M – Citroën (partnership between GM & PSA)
  • O – Opel/Vauxhall


5th position is an optional qualifier: for example the Sales market area:

  • S – sales market China
  • N – sales market North-America
  • I – electric/hybrid


For example E2UB-N is the Crossover Buick for the North-American market in the second generation of the Epsilon platform.

Current and historical applications

GM uses platforms to make a hierarchy of models aimed at different market segments. The following table attempts to place each shared platform in context. As General Motors has integrated worldwide operations, platforms are now shared globally.

Front wheel drive

Vehicle Type Platform Chevrolet Pontiac Oldsmobile Buick Cadillac Saturn Geo GMC Opel/Vauxhall Daewoo Isuzu Holden
Subcompact M platform Sprint
Metro
Firefly - - - - Metro - - - Geminett Barina
Subcompact GM4200 Celta
Agile
Montana II
- - - - - - - Corsa
Tigra
Combo
- - Barina
Subcompact Daewoo T Aveo G3
Wave
- - - - - - - Kalos - Barina
Subcompact
Mini CUV
Mini MPV
Gamma
SCCS
Gamma 2
G2XX
Spark
Aveo/Sonic
Trax
- - Encore - - - - Corsa
Meriva
Combo
Mokka
Adam
- - Barina
Compact X platform Citation Phoenix Omega Skylark - - - - - - - -
Compact J platform Cavalier 2000
J2000
Sunbird
Sunfire
Firenza Skyhawk Cimarron - - - Ascona
Vauxhall Cavalier
Espero Aska Camira
Compact N platform
L platform
Beretta
Corsica
Malibu
Grand Am
Tempest
Cutlass Calais
Achieva
Alero
Cutlass
Skylark
Somerset
- - - - - - - -
Compact P platform Spectrum Asuna Sunfire
Sunburst
- - - - Storm
Spectrum
- - - Gemini
Piazza
I-Mark
Stylus
Piazza
Gemini
Compact T platform - LeMans
Asüna SE/GT
Passport Optima
- - - Astra - - Kadett
Kadett Combo
Astra
Zafira
LeMans
Cielo
- Astra
Zafira
Compact S platform Prizm
Nova
Vibe - - - - Prizm - - - - Nova
Compact Daewoo J Optra - - Excelle - - - - - Nubira
Lacetti
- Viva
Compact
Compact MPV
Delta
Delta 2
D2XX
Cobalt
Cruze
Volt
HHR
Orlando
G5
G4
Pursuit
- Verano
Excelle
ELR Ion - - Astra
Zafira
Ampera
Cascada
Lacetti Premiere - Cruze
Astra
Volt
Mid-size A platform Celebrity 6000 Cutlass Ciera
Cutlass Cruiser
Century - - - - - - - -
Mid-size GM2900 - - - - - L-Series - - Vectra
Calibra
Vauxhall Cavalier
- - Vectra
Calibra
Mid-size Daewoo V Tosca
Epica
- - - - - - - Leganza
Magnus
Tosca
- Epica
Mid-size
Full-size
Epsilon
Epsilon 2
E2XX
P2XX
Malibu
Malibu Maxx
Impala
G6 - Regal
LaCrosse
BLS
XTS
Aura - - Vectra
Signum
Insignia
Alpheon - Malibu
Insignia
Commodore
Mid-size
Full-size
W platform Lumina
Monte Carlo
Impala
Grand Prix Cutlass Supreme
Intrigue
Regal
Century
LaCrosse
- - - - - - - -
Full-size H platform
G platform
C platform
K platform
- Bonneville Eighty-Eight
Ninety-Eight
Aurora
LeSabre
Electra
Park Avenue
Riviera
Lucerne
Deville
Seville
DTS
- - - - - - -
Personal Luxury E platform
V platform
- - Toronado Riviera
Reatta
Eldorado
Allante
- - - - - - -
Compact Crossover
Mid-size Crossover
Theta Equinox
Captiva
Torrent - - SRX Vue - Terrain Antara Winstorm - Captiva 7
Captiva 5
Minivan
Mid-size Crossover
U platform Lumina APV
Venture
Uplander
Trans Sport
Montana
Aztek
Silhouette Terraza
Rendezvous
GL8
- Relay - - Sintra - - -
Mid-size Crossover
Full-size Crossover
Lambda
C1XX
Traverse - - Enclave XT5 Outlook - Acadia - - - Acadia

Rear wheel drive

GM reused some platform names between the front and rear wheel drive families.

Vehicle Type Platform Chevrolet Pontiac Oldsmobile Buick Cadillac Saturn GMC Hummer Opel/Vauxhall Holden Isuzu
Subcompact H platform Vega
Monza
Astre
Sunbird
Starfire Skyhawk - - - - - - -
Subcompact T platform Chevette T1000
Acadian
- - - - - - Kadett
Chevette
Gemini Gemini
Compact Y platform
Z platform
Corvair Tempest
LeMans
F-85
Cutlass
Special
Skylark
- - - - - - -
Compact X platform
K platform
Nova Ventura
Phoenix
Omega Apollo Seville - - - - - -
Compact
Mid-size
Pony car
Alpha Camaro - - - ATS
CTS
- - - - - -
Mid-size A platform
G platform
Malibu
Chevelle
El Camino
Tempest
Grand Prix
LeMans
Bonneville
Cutlass
Cutlass Supreme
Special
Century
Regal
- - Caballero - - - -
Mid-size
Full-size
V platform - GTO - - Catera - - - Commodore
Omega
Senator
Monza
Rekord
Carlton
Commodore
Caprice
Monaro
-
Mid-size
Mid-size Crossover
Sigma - - - - CTS
STS
SRX
- - - - - -
Full-size B platform
C platform
D platform
Impala
Caprice
Bonneville
Catalina
Parisienne
Safari
88
98
Custom Cruiser
LeSabre
Electra
Estate
Roadmaster
DeVille
Fleetwood
Brougham
- - - - - -
Full-size Omega - - - - CT6 - - - - - -
Full-size
Pony car
Zeta Camaro
Caprice
SS
G8 - Park Avenue - - - - - Commodore
Caprice
-
Personal Luxury E platform - - - Riviera - - - - - - -
Pony car F platform Camaro Firebird - - - - - - - - -
Sports car Y platform Corvette - - - XLR - - - - - -
Roadster Kappa - Solstice - - - Sky - - GT (Roadster) - -
Compact  Pickup
Mid-size Pickup
GMT300
GMT355
S10
SSR
Colorado
- - - - - S15
Sonoma
Canyon
- - Colorado D-Max
Full-size Pickup
Full-size SUT
GMT800
GMT900

GMT K2XX
Silverado
Avalanche
- - - Escalade EXT - Sierra H2 SUT - - -
Compact SUV Suzuki Tracker Sunrunner - - - - Tracker - - - -
Mid-size SUV GMT300
GMT360
Blazer
TrailBlazer
- Bravada Rainier - - Jimmy
Envoy
H3 - - -
Full-size SUV GMT800
GMT900

GMT K2XX
Tahoe
Suburban
- - - Escalade - Yukon H2 - - -
Mid-size Van M platform Astro - - - - - Safari - - - -
Full-size Van GMT600 Express - - - - - Savana - - - -

Others

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

Badge-engineered and non-GM products:

External links