4wd problem

[xdave32x]

Hey everyone. I have a 2000 silverado 2500 with electronic 4wd. I've replaced the actuator, and just replaced the 4wd dash control. Still my service 4wd light is on, the light for 4 hi 4lo and 2wd doesn't light up anymore and there's no noise from the actuator. What could be the problem?

[gmtech4]

There is a code in the TCCM to be pulled ,

 

You have to get it scanned by a scanner that is capable to pull them

 

Stop guessing

[06pirate]

Yes, get it scanned and find out before it leaves you broken down on the road. My 2006 Sierra was doing that and I ignored it until the transfer case grenaded, but I was only 1.3miles from home and managed to limp it in. The transfer case oil was full of metal chunks as well as the bad encoder motor.