Introduced in 2002 as a 2003 model, the CTS was built on GM's new rear-wheel drive Sigma platform. It marked a return to RWD cars for the brand, and was the first Cadillac to be offered with a manual transmission since the 1988 Cimarron. The CTS was designed as a replacement for the badge-engineered, Opel-based Catera. The CTS was nominated for the North American Car of the Year award for 2002.
CTSs are manufactured at GM's Lansing Grand River plant in Lansing, Michigan. The CTS was also assembled in China during 2006, and production was subsequently discontinued.
Originally powered by a 3.2 L LA3 V6 producing 220 hp (164 kW), the CTS received an updated 3.6 L DOHC V6 with variable valve timing in 2004, producing 255 hp (190 kW) and 252 lb·ft (342 N·m) of torque. The 3.2 L engine went out of production in 2005, when a new 2.8 L version of the DOHC V6 debuted in an entry-level version of the CTS. In Europe, the 2.8 L replaces the previous entry-level 2.6 L engine.
The CTS was originally offered with either GM's in-house five-speed 5L40-E automatic transmission or a five-speed Getrag 260 manual transmission. For the 2005 model year, the Getrag was replaced with an Aisin AY-6 six-speed.
Source: Wikipedia, 2011