2018 BUICK LaCrosse LFV/LFW (Avenir/LaCrosse base GX)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Timing chain stretch (rare with proper maintenance)
• Turbocharger issues affect some 2.0L variants in high mileage

First checks

• Check for oil leaks around valve covers and oil pan
• Inspect timing chain noise
• Verify no CEL due to emissions sensors

Before replacing parts

• 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

• 2018 Buick LaCrosse sold primarily in North America and China; engine availability varies by market
• Oil capacity includes oil filter replacement; synthetic oil recommended for longevity