Turbocharger Oil Leak From Compressor Seal

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Condition	Action
IMPORTANT: Oil in the turbocharger air inlet duct, oil on the compressor wheel, and oil throughout the charge air cooler system is normal with a closed PCV system. Do not attempt repairs for this condition.
Restricted air system	Inspect for clogged air filter element or restricted air inlet system.
Restricted exhaust system	Inspect for a restricted exhaust.
Leaking exhaust system.	Inspect for exhaust manifold leaks.
Poor oil drainage from turbocharger	Inspect for restricted turbocharger oil drain pipe.
Restricted crankcase ventilation system	Inspect for restricted crankcase ventilation system.
Worn internal engine components	Inspect for excessive blowby or engine oil consumption.