GMC Sierra 2500 Problem Report

GMC Sierra 2500 Service 4WD Message May be Displayed

(8 reports)

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

service 4 wheel drive message and lights switch to 4 low or just blink. must turn off p/u to stop and show 2 wheel. -
service 4wd light on -
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