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Cadillac CTS 2nd Generation

20082013 · Sigma II · sedan

Second-generation CTS on GM's revised Sigma II platform. Offered as sedan, coupe (2011+), and sport wagon (2010+). 3.0L LF1 V6 (270 hp) and 3.6L LLT/LFX direct-injected V6 (304-318 hp). 2008 Motor Trend Car of the Year. CTS-V (2009-2014) uses the 6.2L supercharged LSA V8 (556 hp).

Watch out: 3.6L LLT/LFX direct-injection intake-valve carbon buildup is the recurring fuel-system complaint — symptoms start around 60-80k miles, walnut-blast cleaning is the standard fix. Timing-chain stretch on pre-2012 builds is the secondary engine issue.

Full clubhouse — owner Garage Lineage, common problems, year-by-year notes, and product picks — is on the build list.

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