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A Brief History of the 2005 Cadillac STS

The origins of the STS were from the Cadillac Seville, which was dropped in 2004. STS stood for “Seville Touring Sedan” and was originally a performance package for the Seville. Size-wise it fits between the Cadillac CTS and full-size DTS. The STS was rear-wheel drive based on the Sigma GM corporate platform. An STS-V performance variant was produced from 2006-2009, featuring a 4.4-Liter Northstar V8. The 3.6-Liter LY7 V6 was standard. The first generation ran from 2005-2007. The 2008 STS marked the new design still based off of the Sigma platform. Cadillac also assembled the STS in Shanghai, China, called SLS from 2007-2013. A larger CTS introduced in 2014 succeeded the STS.

2005 STS

The base engine for the STS is the 3.6-Liter V6, rated at 255hp, while the optional engine is the 4.6-Liter Northstar V8 delivering 320hp. Variable valve timing is featured in both engines which are backed by a 6L50 six-speed automatic transmission. Both StabiliTrak and Magnetic Ride Control are available.

AVAILABLE MODELS:

2005 STS

  • Body Style
  • Four-Door Sedan
  • Engine Options
  • 3.6-Liter V6
  • 4.6-Liter V8

2005 STS VIN Decoder:

First Character: Country

  • 1 ~ USA

Second Character: Manufacturer

  • G ~ General Motors

Third Character: Division

  • 6 ~ Cadillac

Fourth and Fifth Characters: Car Line/Series

  • D/C ~ STS-V8
  • D/W ~ STS-V6

Sixth Character: Body Style

  • 6 ~ Four-Door Sedan

Seventh Character: Restraint Systems

  • 1 ~ Active Manual Belts
  • 2 ~ Active Manual Belts, Driver/Passenger Inflatable Restraint Frontal
  • 3 ~ Active Manual Belts, Driver/Passenger Inflatable Restraint Frontal, Automatic Occupant Sensor, Passenger
  • 4 ~ Active Manual Belts, Driver/Passenger Inflatable Restraint Frontal/Side
  • 5 ~ Active Manual Belts, Frontal Inflatable Restraints, Driver/Passenger/Side Inflatable Restraints-Driver Side
  • 6 ~ Active Manual Belts, Driver/Passenger Inflatable Restraints, Frontal/Side, Automatic Occupant Sensor
  • 7 ~ Active Manual Belts, Driver/Passenger Inflatable Restraints, Frontal/Side, Rear Passenger Inflatable Restraints, Side

Eighth Character: Engine Type

  • A ~ 4.6L V8
  • 7 ~ 3.6L V6
  • Y ~ 4.6L V8

Ninth Character: Check Digit


Tenth Character: Year

  • 5 ~ 2005

Eleventh Character: Assembly Plant

  • B ~ Lansing, Michigan
  • C ~ Lansing, Michigan
  • M ~ Lansing, Michigan

Seventh-Twelfth Characters: Sequential Production Number
Standard Sequence