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# 3950.

Affected Component: ENGINE AND ENGINE COOLING:ENGINE

Summary

INTERMITTENT SERVICE 4 WHEEL DRIVE LAMP ON AND CODE C0378. *KB UPDATED 10/03/07. *NJ

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