'97 Z71 4wd problems

I've lost my 4wd and I believe the transfer case control module (tccm) may be the culprit. I know the dealer in the nearest city will gouge me for a new one. Where can I find one online? I've attempted to find one without success. Also does anyone know where the tccm is located on a '97 Z71 sierra with a 5.7 litre?

wrong forum, this is for the s-series trucks. moving to the gmc sierra forum.

Try www.gmpartsdirect.com