srhinehart

I have an 05' Silverado Crew Cab with 67000 miles on it, and recently the "Service 4WD" comes up on my display. The problem is that when it it comes up, I do not have any lights on the 2WD/4WD selector area and I can't change it unless I turn the truck off a time or two and the lights come back on. Does anyone have any idea what could be the problem before I spend a bunch of money at the dealership?

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Ridge Runner

Check the encoder motor.

mschanha

I had the same problem with my 99 Silverado at around that same mileage. Turned out it was the switch (easy to install). But you know, it's a hit and miss proposition.You can get a switch on-line gmpartsdirect.com for about $50.

srhinehart

You don't happen to remember the part number do you?

srhinehart

You don't happen to remember the part number do you? Or possibly where on GMpartsdirect I could go to find the part?

mschanha

The parrt number for the switch is 15709327.

krzykjn

My 1999 was the switch also!!

srhinehart

Come to find out, it is the encoder. I had a mechanic at my work run the codes...Does anyone know how to fix it?