GM Sigma Platform - Sigma II

Sigma II

Sigma II, larger and wider than its previous counterpart, debuted with the 2008 CTS, and shares more parts with the larger Zeta than the smaller Sigma I. Sigma II is more flexible and features the Direct Injection 3.6 HF V6 as its primary engine and a new more powerful 3.6 L DI HF V6, as well as supercharged smallblock V8 for the Cadillac CTS-V. Sigma will stay a Cadillac exclusive. Coupe and wagon versions arrived for the 2011 model year. Vehicles using this platform:

• Cadillac CTS 2008–present
• Cadillac CTS-V 2009–present