2007 CADILLAC STS LH2/LC3 (GMX172)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Northstar engine intake manifold gasket leaks
• Fuel injector problems on V6 engines

First checks

• Inspect cooling system for leaks
• Check oil and transmission fluid condition
• Verify timing chain noise

Vor dem Teiletausch

• Save fault codes and freeze-frame data before clearing anything.
• Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
• Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.

Important notes

• 2007 was the last model year for the Cadillac STS before the introduction of the CTS as the flagship sedan.
• Engine and transmission offerings varied by market; some global markets had limited availability of the V8 engine.