Hey going up the turnpike today in my 2000 ZR2 and I was watching the odometer hit 82,000
As soon as it hit my service 4WD light came on and my 4 button selector went dark.
Is this a Schedule thing or coincidence? It will not shift in to 4X4,
Just wanted to know before I take it to get the codes pulled and if so how do I reset it?

 

That's definitely not scheduled. Get the codes read and report back.

 

Well no codes but found that ATC was very low on blue goo filled the case and then the 20amp ATC fuse went replaced the fuse and she is back to normal took her off road and all no problems at all

 

My 2004 ZR-2 did this to me yesturday, regular normal driving conditions out of the BLUE! I hit a grocery store for something, came out restarted it, and it went away. A flareup? Not sure where to go from here..