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Cadillac STS 1st Generation

2005–2011 · Sigma · sedan

Mid-size luxury sedan on GM's Sigma platform — first RWD Cadillac STS, with optional AWD. 3.6L LY7 V6 (255-302 hp) and 4.6L LH2 Northstar V8 (320 hp). The 2006-2009 STS-V used a 4.4L LC3 supercharged Northstar V8 (469 hp). 6-speed automatic. Production ended May 4, 2011; replaced by the stretched 2014 CTS.

Watch out: Northstar head-bolt failures (a chronic Northstar-family issue — bolts strip the aluminum block threads, leading to head-gasket failure) is the catastrophic concern. Time-Sert thread repair is the standard fix; STS-V supercharged is especially vulnerable.

What your STS takes

The parts and fluids that fit this generation. Specs we publish are confirmed against two independent sources; the rest fill in as we verify them.

  • Wiper blades22" driver · 21" passenger✓ VerifiedView
  • Tire sizeNot catalogued yetFind yours soon
  • Engine oilNot catalogued yetFind yours soon
  • Oil filterNot catalogued yetFind yours
  • Engine air filterNot catalogued yetFind yours
  • Cabin air filterNot catalogued yetFind yours
  • Spark plugsNot catalogued yetFind yours soon
  • Headlight bulbsNot catalogued yetFind yours soon
  • BatteryNot catalogued yetFind yours soon
  • CoolantNot catalogued yetFind yours soon
  • Brake fluidNot catalogued yetFind yours soon
  • Transmission fluidNot catalogued yetFind yours soon
  • Tire pressureNot catalogued yetFind yours soon
  • Key fob batteryNot catalogued yetFind yours soon
  • Power steering fluidNot catalogued yetFind yours soon
  • Differential fluidNot catalogued yetFind yours soon
  • Serpentine beltNot catalogued yetFind yours soon
  • Brake padsNot catalogued yetFind yours soon
  • Wheel fitmentNot catalogued yetFind yours soon
  • Brake rotorsNot catalogued yetFind yours soon
  • ThermostatNot catalogued yetFind yours soon
  • A/C refrigerantNot catalogued yetFind yours soon
  • Fuel filterNot catalogued yetFind yours soon

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

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