GM Epsilon platform

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GM Epsilon platform
Chevrolet Malibu LTZ 2.4 – Frontansicht, 9. August 2013, Velbert.jpg
Manufacturer General Motors
Production 2002–present
Body and chassis
Class Compact (C) platform
Mid-size (D) platform
Large car (E) platform
Layout Front engine, front-wheel drive/all-wheel drive
Body style(s) 2-door Convertible
4-door Sedan/Saloon
5-door Hatchback/Liftback
5-door Station wagon/Estate/Caravan
5-door Multi-purpose vehicle
Vehicles Buick Lacrosse/Alpheon
Cadillac BLS
Cadillac XTS
Chevrolet Classic
Chevrolet Impala
Chevrolet/Holden Malibu
Chevrolet Malibu Maxx
Fiat Croma
Opel Insignia/Buick Regal
Opel Signum
Opel Vectra
Pontiac G6
Roewe 950
Saab 9-3
Saab 9-5
Saturn Aura
Related GM Alpha platform
Engine(s) Gasoline/Petrol engines:
Ecotec I4
Ecotec Family 1 I4
54° V6
High Value V6
High Feature V6
Diesel engines:
Multijet I4, I5
Family B I4
Dmax V6
Predecessor GM N platform
GM2900 platform
GM W platform
GM G platform
GM Zeta Platform

Epsilon is General Motors' mid-size front-wheel drive automobile platform. The architecture was developed by Opel, and debuted in the 2002 Opel Vectra and 2003 Saab 9-3. Since this platform falls squarely in the center of the worldwide automobile market, GM plans to produce a great many Epsilon vehicles with over a dozen variations. As of 2005, it was GM's highest volume worldwide platform. Even after the dissolution of the GM/Fiat partnership, both companies retain the rights to continue developing Epsilon-derived models.


GM's Epsilon platform replaced the N platform in the US, and replaced the GM2900 platform elsewhere. Vehicles of this platform generally carry the symbol "Z" in the fourth digit of their VINs.

When the platform debuted, there was talk of an "Epsilon Wide" derivative, which was supposed to have provided the underpinnings for the Buick LaCrosse and Saab 9-5. However, the program was cancelled and the LaCrosse was put on the W platform, and the 9-5 was given a quick refresh for the 2006 model year.[citation needed]

Many of the Epsilon vehicles use the Ecotec Inline-four engines and both the High Value and High Feature V6 engines.

The refreshed 2008 SAAB 9-3 debuted with an advanced version of all-wheel-drive it dubbed XWD, finally giving a definitive answer to rumors about the platform's ability to support AWD, which had been around since the debut of the platform.

The Lambda and Theta Premium crossover platforms are derived from Epsilon.[citation needed]


Vehicles based on the Epsilon I platform:

Cancelled vehicles which would have used this platform:

Epsilon II[edit]

A new version of the Epsilon, dubbed Epsilon II, debuted in 2008. It is adaptable for front and all-wheel drive applications. In long wheelbase format, Epsilon II supports US EPA Large Cars, allowing GM to replace the G and W platforms. The architecture was developed by Opel in Rüsselsheim, Germany. Many safety features and AWD fitment modifications were done by Saab.[1]

Current and announced vehicles built on Epsilon II:

Concept vehicles built on Epsilon II:


E2XX is the successor to the Epsilon II platform. It is a fork of the Epsilon II platform, consistent with other platform revamps, such as D2XX (based on Delta II).

The E2XX platform targets weight reduction, improved interior, and longer wheelbases. The E2XX is utilized in the redesigned 2016 Chevrolet Malibu.

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.

Vehicle built on E2XX:


P2XX is the longer variant of the E2XX platform. It is used in the 2017 Buick LaCrosse and next generation Chevrolet Impala.


C1XX is the crossover variant of the E2XX platform, replacing the Theta Premium and Lambda platforms. It underpins the 2017 Cadillac XT5 and soon to be followed the 2017 GMC Acadia in regular wheelbase form, while the 2018 Chevrolet Traverse and 2018 Buick Enclave will utilize the long wheelbase variant.[3]


  1. ^ Meiners, Jens (May 2009). "Spied: 2010 Saab 9-5". Car and Driver. Hearst Magazines. Retrieved 2013-05-05. 
  2. ^ Sutcliffe, Ashley (12 April 2012). "Roewe | Roewe 950 hits the market, priced competitively". China Car Times - China Auto News. Retrieved 2 October 2012. 
  3. ^ "GM C1XX Vehicle Platform". GM Authority. Retrieved 2016-01-10.