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December 27, 2012 Service bulletin

Equipment: mechanical

Chevrolet technical service bulletin PIP4138L for 2006-2009 Chevrolet Impala, 1999-2013 Chevrolet Tahoe and 1999-2013 Chevrolet Silverado and others.

Bulletin number
PIP4138L
Component
Equipment: mechanical
Summary
This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on, engine misfire, and/or engine noise. Technician may find Diagnostic Trouble Codes P0300-P0308. If published Service Information diagnostics does not isolate the cause of this concern technician should check for a worn camshaft lobe and/or lifter roller, a sticking valve, valve leakage, a broken valve spring, and a collapsed active fuel management lifter.

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