January 14, 2009My service 4WD message came on this morning, 4wd works,whats the most likely cause. Truck is a 2003 GMC Sierra 1500
Forums : General Discussions : Service 4WD message (235 Views)
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January 14, 2009Mine did the same thing. It is a 1999 Silverado. I replaced the dash switch inside the truck, and haven''t seen it for months....Common issue I believe.
January 14, 2009mines came on every day since i bought my truck. 4wd still works and i had it checked out too.
January 14, 2009Is the Push button? Mine did the same thing, took it to shop and they claimed that the motorized housing under the truck the switches in and out fo 4wd was about to go out. Warrenty covered it.. problem solved..
January 15, 2009Bad switch *or* a bad encoder motor are the most common issues that cause the service 4wd message.