Service 4WD Message May be Displayed on Chevrolet Silverado 2500 HD

The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will be of assistance in determining the exact fault causing the message to be displayed.

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Average mileage: 148,781 (2,300–277,502)
Drive Train affected: 4WD
7 model years affected: 2001, 2002, 2003, 2004, more2005, 2008, 2013
17 people reported this problem
6 people shared problem details
PUSH BUTTON FOR FOUR HIGH AND THE LIGHT BLINKS AND SERVICE 4X4 CODE COMES UP.TRIED PUTTING IN FOUR LOW AND IT MADE A CLUNK AND COULD NOT GET OUT THEN AFTER TRING FOR A WHILE IT CAME OUT?
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service 4wd message came on. replaced position switch
1 person likes thisFlag inappropiate
2015 Silverado 2500 4WD service warning comes on for no apparent reason.
service 4WD light came on at 97654 as I pulled into my driveway turned pickup off and restarted and light stayed off. Then at 105136 service 4WD light came on again diving down the highway pulled off the highway onto shoulder turned pickup off and then restarted light stayed off but taking pickup to be serviced this week.
information center displays service 4x4 changed 4x4 transfer case selector same issue service 4x4
Replaced 4WD electrical engage system one year ago and the problem has now returned. The cost was over $800.00 for this repair.
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