2006 CADILLAC DTS L37 (GMX306)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Timing chain tensioner issues leading to rattle noise
• Electric throttle body sensor faults

First checks

• Inspect timing chain condition and tensioner
• Check for oil leaks around valve covers and oil pan
• Verify transmission fluid condition

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 2006 DTS was sold primarily in North America; availability in other global markets was limited.
• Engine code L37 denotes the Northstar Series II 4.6L V8 equipped in 2006 DTS models.