GM Delta platform

Delta is General Motors' compact front-wheel drive automobile and crossover SUV platform, a successor to the GM T platform; it also replaced GM J platform and the Z platform used by the Saturn S-Series. The platform debuted in the 2003 Saturn Ion. Vehicles of this platform generally carry the letter "A" in the fourth character of their VINs.

Main article: List of GM platforms
GM Delta platform
Overview
ManufacturerGeneral Motors
Production2003–present
Body and chassis
ClassCompact (C)
Body style(s)2-door coupe
2-door convertible
3-door hatchback
4-door sedan
4-door SUV
5-door hatchback
Chronology
PredecessorGM J platform
GM R platform
GM T platform
GM Z platform
SuccessorFor Opel & Vauxhall:
PSA EMP2 platform

Delta uses an independent suspension in front and Twist beam type in the rear. The Ecotec engine is widely used, as are a 4-speed automatic and 5-speed manual transmission.

Delta

Applications

Former vehicles based on this platform:

  • Opel Astra H
  • Opel Zafira B
  • Vauxhall Zafira B
  • Holden Astra
  • Vauxhall Astra Mk5
  • Saturn Astra
  • Saturn Ion
  • Chevrolet Astra/Vectra GTC
  • Chevrolet Cobalt
  • Pontiac G5/G4/Pursuit coupe
  • Chevrolet HHR

Delta II

Delta II is General Motors' current compact car platform, which was developed by Opel in Germany. It is the successor to the GM Delta platform. Internally it is simply known as a new Global Compact Vehicle Architecture or GCV.

The platform features a torsion beam rear suspension with optional Watt's link which improves vehicle handling; such configuration is used in the Opel Astra and some trim-levels of the American-market Chevrolet Cruze. This suspension is usually described as semi-independent, meaning that the two wheels can move relative to each other, but their motion is still somewhat inter-linked, to a greater extent than in a true independent rear suspension (IRS). This can mildly compromise the handling and ride quality of the vehicle. For this reason, some manufacturers have changed to different linkage designs. As an example, Volkswagen dropped the torsion beam in favour of a true IRS for the Volkswagen Golf Mk5, possibly in response to the Ford Focus' Control Blade rear suspension. Opel/Vauxhall have continued to use twist or torsion beam suspension. This is at a cost saving of €100 per car compared to multi-link rear suspension.[1] Their latest version as used in the 2009-on Opel Astra uses a Watts linkage at a cost of €20 to address the drawbacks and provide a competitive and cost effective rear suspension.[1] The Renault Megane and Citroen C4 also have stayed with the twist beam.[2] The twist beam has been shown to suffer less from bush wear, than fully independent multi-link suspension, thus resulting in a virtually maintenance free rear suspension.

GM chose this compact vehicle architecture for its first Voltec application, the Chevrolet Volt. Production began in November 2010 with the first Chevrolet Volts delivered to retails customers in December 2010[3]

Applications

Production vehicles based on Delta II platform:

  • Chevrolet Cruze
  • Daewoo Lacetti Premiere
  • Holden Cruze
  • Opel Astra J
  • Buick Verano
  • Buick Excelle XT
  • Buick Excelle GT
  • Vauxhall Astra Mk6
  • Chevrolet Volt (first generation)
  • Holden Astra
  • Holden Volt
  • Opel Zafira C
  • Vauxhall Zafira Mk3
  • Opel Ampera
  • Vauxhall Ampera
  • Chevrolet Orlando
  • Opel Meriva B
  • Vauxhall Meriva B
  • Cadillac ELR
  • Baojun 560
  • Opel Cascada
  • Vauxhall Cascada
  • Buick Cascada
  • Holden Cascada
  • Chevrolet Cavalier

D2XX/D2UX

General Motors introduced its new global platform named D2XX flexible platform in August 2012. The new platform was mainly engineered by GM's former German subsidiary Opel in Rüsselsheim.[8] According to GM the company invested US$220 million for the all new D2XX platform.

The platform was developed for compact vehicle architecture, replacing both Delta II and the midsize crossover GM Theta platform.[9]

Vehicles that used the new platform included:

  • Chevrolet Cruze
  • Holden Astra Sedan
  • Opel Astra K
  • Vauxhall Astra Mk7
  • Holden Astra Hatchback
  • Buick Verano GS
  • Chevrolet Volt (second generation)
  • Buick Velite 5
  • Buick Verano Sedan (second generation)
  • Buick Envision
  • Chevrolet Equinox
  • Holden Equinox
  • GMC Terrain
  • Chevrolet Orlando

GM-PATAC K

In 2015 Pan Asia Technical Automotive Center (PATAC), GM's joint development center with SAIC, revealed their own simplified variant of D2XX, known as the "GM-PATAC K" platform (rather than "K" so as to distinguish it from the former GM K platforms).[11] The following vehicles use this variant of the platform, none of which are sold in the United States:

  • 2018 Buick Excelle GT
  • 2016 Chevrolet Cavalier
  • 2019 Chevrolet Monza
  • 2018 Buick GL6

References
  1. Richard Aucock (January 22, 2010). "Astra suspension by Automotive Engineer". Archived from the original on 2014-04-13. Retrieved 2012-09-09.
  2. Simon Bickerstaffe (December 1, 2010). "Vehicle dynamics & chassis: A new leaf". Archived from the original on November 3, 2016. Retrieved September 9, 2012.
  3. "NEW 2011 Chevy Volt - Gearhart Chevrolet Delivers First Volt in America". December 16, 2010.
  4. Paris debut for new Chevrolet Cruze sedan
  5. "GM to produce Cadillac Converj with Volt's plug-in technology" Archived 2013-10-11 at WebCite (Automotive Week) January 11, 2010
  6. "GM Will Produce Volt-Based Cadillac Converj Plug-in Concept" (Motor Trend) January 11, 2010
  7. http://www.opel.de/fahrzeuge/modelle/personenwagen/cascada/konfigurator.html#trim
  8. https://www.cnbc.com/id/101041918
  9. http://www.autoevolution.com/news/gms-d2xx-platform-detailed-48772.html
  10. http://www.kbb.com/car-news/all-the-latest/2016-chevrolet-volt-unveiled-more-range-passenger-room/2000011569/
  11. "New Details About All-New Chevrolet Monza Sedan Emerge". GM Authority. Retrieved 2020-04-17.
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