Interesting Facts About the Cadillac STS Sigma
The Cadillac STS was a mid‑size luxury 4‑door sedan produced from 2004 to 2011, covering the 2005‑2011 model years. It was introduced as a strategic move to keep Cadillac customers from drifting toward European luxury brands.
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Launch and Production Run
The STS debuted in 2004 for the 2005 model year and remained in production until the end of the 2011 model year, giving the model a seven‑year presence in Cadillac’s lineup.
Engine Change and Model Replacement
In its final year of production (2011), the V‑8 engine was dropped from the STS. The following year, Cadillac introduced the XTS, which replaced both the STS and the DTS.
Growing Difficulty Finding Parts
Owners and enthusiasts note that genuine STS parts are becoming harder to locate, with forums reporting a shrinking supply of both OEM and aftermarket components.
Popular Cadillac STS Parts
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