'99 Chevy Silverado 2500 4x4 will not lock in.
>
> 4x4 is push-button, if that matters? 4x4 Indicator light does not show-up
> on dash either.
>
> Does anyone have experience with this issue?
>
> Thanks in advance.
>
> Mark H. Bowen
Not on a silverado, but on my Jimmy.
The 4x4 is engaged by a vacumn actuator connected via circuits to your button.
After almost ten years, the wires may be corroded or the actuator may be out, or the fuse may be shot.
I xposted to alt.autos.4x4.chevy-trucks.