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GMC Sierra 1500 HD Car Problems

Service 4WD Message May be Displayed on GMC Sierra 1500 HD

Problem Description and Solution

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

(12 people reported this problem)

Problem Data

RepairPal Verified
Average mileage: 120,500 (72,000–180,000)
Drive Trains affected: 4WD, Automatic Transmission
5 model years affected: 2001, 2002, 2003, 2004, more2005

Not Your GMC Sierra 1500 HD Problem?

Brake problem? Or maybe a faulty head gasket cylinder?
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