2004 Cadillac CTS OIL & TEMP GUAGE, CRUISE, ANTITHEFT, T

Electrical problem
2004 Cadillac CTS Engine Size unknown Two Wheel Drive Automatic 50000 miles

I own a 2004 CTS and recently experience a problem as follows:
cruise won't work, temp & fuel guages won't work, anti theft indicator on continuoiusly, traction control indicator on continuoiusly, shifter position lights don't work, and key won't release after stopping motor.

Can anyone help. I am sure all these are related to the same cause but I can't find it.

thks.