TSB Document:

• Sorry, the NHTSA has not posted this TSB document yet.

You can still get the detailed info from GMC for this TSB. Call your local GMC dealer's service department & ask for a copy of TSB# 3121.

Affected Component: ENGINE AND ENGINE COOLING

Summary

EXHAUST VIBRATION RESONANCE OR MOAN. (2004-2005 GMC DENALI) *SC

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