2012 BUICK LaCrosse LAF/LF1 (GMX127)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Timing chain stretch in high mileage LAF engine
• Intake manifold gasket leaks

First checks

• Inspect timing chain and guides
• Check for intake manifold gasket leaks
• Verify condition of engine mountings

Avant de remplacer des pièces

• 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

• The 2012 Buick LaCrosse was sold primarily in North America with the 3.0L LAF V6; the Chinese market received a different engine variant, the 2.8L LF1 V6.
• Oil capacity figure includes service-fill volume and accounts for filter replacement during oil service.