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GM Sigma platform
 
 
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Sigma is General Motors' mid-size
Mid-size car

A mid-size car is the North American and Australian term for an automobile with a size between that of a Compact car and a full-size car. In Europe, cars of a similar size are often referred to as large family cars, or executive cars....
 rear-wheel drive automobile platform
Automobile platform

An automobile platform is a shared set of common design, engineering, and production efforts, as well as major components over a number of outwardly distinct models and even types of automobiles, often from different, but related marques....
. The architecture debuted in 2002 with the 2003 Cadillac CTS
Cadillac CTS

The CTS is a mid size luxury car made by General Motors for the Cadillac brand.It was introduced as the replacement for the Cadillac Catera in 2003....
 and is adaptable for all-wheel drive and extended wheelbase
Wheelbase

In both road and rail vehicles, the wheelbase is the distance between the centers of the front and rear wheels....
 versions. Development of the Sigma platform began at Holden
Holden

GM Holden Ltd is an Australian Automotive industry based in Port Melbourne, Victoria. The company was originally independent, but since 1931 has been a subsidiary of General Motors ....
 in Australia
Australia

Australia, officially the Commonwealth of Australia, is a country in the southern hemisphere comprising the Australia of the world's smallest continent, the major island of Tasmania, and numerous list of islands of Australia in the Indian Ocean and Pacific Oceans....
 before 1998 as GWRD or Global World Rear Drive.

The long-wheelbase Cadillac STS
Cadillac STS

The STS is a midsize-size car luxury vehicle car manufactured and sold by Cadillac....
 replaced the front-wheel drive
Front-wheel drive

Front-wheel drive is a form of Internal combustion engine/transmission layout used in motor vehicles, where the engine drives the front wheels only....
 GM K platform
GM K platform

The General Motors Corporation K platform was the basis of the Cadillac Seville model over two entirely different automobile platforms.* 1970s GM K platform ...
 Cadillac Seville
Cadillac Seville

The Cadillac Seville is a luxury car that was manufactured by the Cadillac division of United States automaker General Motors as a limited production specialty model in the 1950s and 60s....
. The CTS was a replacement for the rear-wheel drive Cadillac Catera
Cadillac Catera

The Cadillac Catera was a mid-sized automobile that was largely a rebadged version of the Opel Omega MV6 made in R?sselsheim, Germany....
.

The Sigma platform has a four-wheel independent suspension
Independent suspension

Independent suspension is a broad term for any automobile suspension system that allows each wheel on the same axle to move vertically independently of each other....
 with control arm
Control arm

In Suspension , a control arm is a nearly flat and roughly triangular member , that pivots in two places. The broad end of the triangle attaches at the frame and pivots on a bushing....
s in front and multi-link in the rear.






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Encyclopedia


Sigma is General Motors' mid-size
Mid-size car

A mid-size car is the North American and Australian term for an automobile with a size between that of a Compact car and a full-size car. In Europe, cars of a similar size are often referred to as large family cars, or executive cars....
 rear-wheel drive automobile platform
Automobile platform

An automobile platform is a shared set of common design, engineering, and production efforts, as well as major components over a number of outwardly distinct models and even types of automobiles, often from different, but related marques....
. The architecture debuted in 2002 with the 2003 Cadillac CTS
Cadillac CTS

The CTS is a mid size luxury car made by General Motors for the Cadillac brand.It was introduced as the replacement for the Cadillac Catera in 2003....
 and is adaptable for all-wheel drive and extended wheelbase
Wheelbase

In both road and rail vehicles, the wheelbase is the distance between the centers of the front and rear wheels....
 versions. Development of the Sigma platform began at Holden
Holden

GM Holden Ltd is an Australian Automotive industry based in Port Melbourne, Victoria. The company was originally independent, but since 1931 has been a subsidiary of General Motors ....
 in Australia
Australia

Australia, officially the Commonwealth of Australia, is a country in the southern hemisphere comprising the Australia of the world's smallest continent, the major island of Tasmania, and numerous list of islands of Australia in the Indian Ocean and Pacific Oceans....
 before 1998 as GWRD or Global World Rear Drive.

The long-wheelbase Cadillac STS
Cadillac STS

The STS is a midsize-size car luxury vehicle car manufactured and sold by Cadillac....
 replaced the front-wheel drive
Front-wheel drive

Front-wheel drive is a form of Internal combustion engine/transmission layout used in motor vehicles, where the engine drives the front wheels only....
 GM K platform
GM K platform

The General Motors Corporation K platform was the basis of the Cadillac Seville model over two entirely different automobile platforms.* 1970s GM K platform ...
 Cadillac Seville
Cadillac Seville

The Cadillac Seville is a luxury car that was manufactured by the Cadillac division of United States automaker General Motors as a limited production specialty model in the 1950s and 60s....
. The CTS was a replacement for the rear-wheel drive Cadillac Catera
Cadillac Catera

The Cadillac Catera was a mid-sized automobile that was largely a rebadged version of the Opel Omega MV6 made in R?sselsheim, Germany....
.

The Sigma platform has a four-wheel independent suspension
Independent suspension

Independent suspension is a broad term for any automobile suspension system that allows each wheel on the same axle to move vertically independently of each other....
 with control arm
Control arm

In Suspension , a control arm is a nearly flat and roughly triangular member , that pivots in two places. The broad end of the triangle attaches at the frame and pivots on a bushing....
s in front and multi-link in the rear. GM's High Feature
GM High Feature engine

The 3600 LY7 are members of General Motors Corporation' new High Feature engine family of modern DOHC V6s. This new family of engines was introduced in 2004 with the Cadillac CTS....
 V6 and Northstar
GM Premium V engine

The Premium V family of automobile piston engine is General Motors Corporation' modern 90? v engine architecture. The family is most associated with Cadillac 's #Northstar V8, but the family has also seen use at Oldsmobile ....
 V8 are most common, though the small-block V8
GM LS engine

The LS series is a new design intended as the only V-8 engine utilized in General Motors Corporation' line of RWD cars and trucks. The LS series was a clean sheet design with little in common with the classic Chevrolet Small-Block engine....
 has also been used. GM's 5-speed 5L40/5L50 automatic transmission
Automatic transmission

An automatic transmission is an automobile gearbox that can change gear ratios automatically as the vehicle moves, freeing the driver from having to shift gears manual transmission....
 is used throughout the range.

All Sigma vehicles are built at the purpose-built Lansing Grand River
Lansing Grand River

Lansing Grand River Assembly is a modern automobile factory in Lansing, Michigan. Opened in 2001 by General Motors Corporation, the 2,000,000 ft? plant produces vehicles on the company's GM Sigma platform....
 factory in Lansing, Michigan
Lansing, Michigan

Lansing is the List of U.S. state capitals of the U.S. state of Michigan, and the state's sixth largest city. It is located about 80 miles west-northwest of Detroit, Michigan and is mostly in Ingham County, Michigan, although small portions of the city extend into Eaton County, Michigan....
.

Vehicles based on this platform:
  • Cadillac CTS
    Cadillac CTS

    The CTS is a mid size luxury car made by General Motors for the Cadillac brand.It was introduced as the replacement for the Cadillac Catera in 2003....
     2003 - 2007
  • Cadillac SRX
    Cadillac SRX

    The Cadillac SRX is a mid-size Crossover produced by the Cadillac division of United States automaker General Motors since the 2004 model year....
     2004 - 2009
  • Cadillac STS
    Cadillac STS

    The STS is a midsize-size car luxury vehicle car manufactured and sold by Cadillac....
     2005 - present


Sigma II


Sigma II will debut with the 2008 CTS which will be larger and wider than its current counterpart it will share more parts with the larger Zeta than the smaller Sigma I. Sigma II will be more flexible and will feature the new Direct Injection 3.6 HF V6 as its primary engine, the 2.8 HF may receive DI and would likely power the European Sigma cars. Sigma will stay a Cadillac exclusive.

The 2008 CTS will be the first model to ride on Sigma II, an improved version of the Sigma platform. It will be larger than the current model, and use the current 3.6 L HF V6 and a new more powerful 3.6 L DI HF V6, as well as supercharged smallblock V8 for the V-Series CTS. It will debut at the North American International Auto Show. Coupe and Wagon versions could arrive as 2010 model years.

Vehicles using this platform:
  • Cadillac CTS
    Cadillac CTS

    The CTS is a mid size luxury car made by General Motors for the Cadillac brand.It was introduced as the replacement for the Cadillac Catera in 2003....
     2008 - present