GM Epsilon 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[update], 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 Epsilon platform|
|Body and chassis|
|Class||Compact (C) platform|
Mid-size (D) platform
Large car (E) platform
|Layout||Transverse front engine, front-wheel drive/all-wheel drive|
|Body style(s)||2-door Convertible|
5-door Station wagon/Estate/Caravan
5-door Multi-purpose vehicle
Chevrolet Malibu Maxx
Opel Insignia/Buick Regal
|Related||GM Alpha platform|
Ecotec Family 1 I4
High Value V6
High Feature V6
Multijet I4, I5
Family B I4
|Predecessor||GM N platform|
GM W platform
GM G platform
GM Zeta Platform
A total of 16 different models have made use of the GM Epsilon platform, some of which remain in production 17 years after the platform first debuted.
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.
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.
Vehicles based on the Epsilon I platform:
Cancelled vehicles which would have used this platform:
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.
Current and announced vehicles built on Epsilon II:
- 2008–2017 Opel Insignia, Buick Regal (saloon, hatchback, estate) (SWB)
- 2010–2016 Buick LaCrosse/Alpheon (LWB)
- 2010–2012 Saab 9-5 (LWB)
- 2012–present Roewe 950 (LWB)
- 2012–2016 Chevrolet Malibu, Holden Malibu (SWB)
- 2012–2019 Cadillac XTS (LWB)
- 2014–2019 Chevrolet Impala (LWB)
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.
Vehicle built on E2XX:
- 2016–present Chevrolet Malibu
- 2017–present Opel Insignia
- 2018–present Buick Regal
- 2018–present Holden Commodore (ZB)
- 2019–present Cadillac XT4
P2XX is the longer variant of the E2XX platform. It is used in the 2017 Buick LaCrosse.
C1XX is the crossover variant of the E2XX platform, replacing the Theta Premium and Lambda platforms. It underpins the 2017 Cadillac XT5 and 2017 GMC Acadia in regular wheelbase form, while the 2018 Chevrolet Traverse, 2018 Buick Enclave and 2020 Cadillac XT6 will utilize the long wheelbase variant.
- Meiners, Jens (May 2009). "Spied: 2010 Saab 9-5". Car and Driver. Hearst Magazines. Retrieved 2013-05-05.
- Sutcliffe, Ashley (12 April 2012). "Roewe | Roewe 950 hits the market, priced competitively". chinacartimes.com. China Car Times - China Auto News. Archived from the original on 3 December 2012. Retrieved 2 October 2012.
- "GM C1XX Vehicle Platform". GM Authority. Retrieved 2016-01-10.