[Sonny01]

In the immortal words of Gomer Pyle "Well I'll Be, Thank You, Thank You, Thank You" I too have a K1500 with the "Service 4WD" light on but not anymore. Last night I read the posts in this thread and went out to my truck with a flashlight to pull the selector switch. After taking the switch apart and looking at the solder connections I noticed several that were cracked. After resoldering them and driving around with the repaired switch not once did the "Service 4WD" come on. Thanks guys, you saved me a trip to the dredded dealer. They probably would have wanted to rebuild the carburetor.