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GMC Sierra 2500 Problems

Service 4WD Message May be Displayed on GMC Sierra 2500

Problem Description and Possible Solution

The 4WD transfer case position sensor or the selector switch may fail causing the service 4WD message to be displayed.

(16 people reported this problem)

GMC Sierra 2500 Vehicles With This Problem

RepairPal Verified
Average mileage: 153,200 (61,000–230,000)
Drive Trains affected: 4WD, Automatic Transmission
6 model years affected: 1999, 2000, 2001, 2002, more2003, 2004
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Brake problem? Or maybe a faulty head gasket cylinder?
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