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Cadillac CTS 1st Generation

2003–2007 · Sigma · sedan

First-generation CTS on GM's RWD Sigma platform — a $4B Cadillac re-launch. 3.2L LA3 / 3.6L LY7 V6 base. The 2004-2007 CTS-V ran the 5.7L LS6 V8 (400 hp, 6-speed Tremec T56 manual). Defined the 'Art and Science' design language that carried Cadillac forward.

Watch out: 3.6L LY7 timing-chain stretch (early GM 3.6L family-wide issue), plus differential whine and rear-subframe bushing wear on the V models. CTS-V LS6 connecting-rod bearing wear under hard use is the high-mile concern.