GMC TSB #06-06-05-001F

2009 GMC Envoy

TSB Document:

Affected Component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

Summary
This informational bulletin explains a normal condition from changes in Exhaust Tone for Active Fuel Management Engines when in Three or Four Cylinder Mode

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Date Published
MAY 16, 2014
NHTSA TSB #
10137915
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