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March 1, 2011 Service bulletin

Gm: there may be noise coming from the cylinder head, because of low oil pressure which is caused by debris

Chevrolet technical service bulletin PIP-4495C for 2004-2011 Chevrolet Malibu, 2010-2011 Chevrolet Equinox and 2005-2010 Chevrolet Cobalt and others.

Bulletin number
PIP-4495C
Component
Engine and engine cooling: engine
Summary
Gm: there may be noise coming from the cylinder head, because of low oil pressure which is caused by debris. Rm

Owners of these vehicles have filed 4,548 complaints in the engine category.

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