2011 BUICK Regal LFX/2.0T LHU (GMX45)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Timing chain tensioner noise (2.4L)
• Turbocharger wastegate issues (2.0T)

First checks

• Inspect timing chain and tensioner on 2.4L
• Check turbocharger boost and wastegate operation on 2.0T

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

• North American markets primarily used the LFX 2.4L and turbocharged LHU 2.0L engines.
• Chinese market Regal variants had additional engine options with slight tuning differences.