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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1800 (Transfer Case - Mp 3023/3024-NQH) >> Description and Operation >> Transfer Case Description and Operation >> Service 4 Wheel Drive Message

Service 4 Wheel Drive Message

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The Service 4 Wheel Drive Message is a display within the Drivers Information Center (DIC) and cannot be serviced separately. This message is used to inform the driver that a transfer case system malfunction has occurred. The Service 4 Wheel Drive Message is controlled by the transfer case shift control module via GMLAN.

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