veesilverado

My 05 Silverado's factory stereo went out, bought a new one, and had it installed. The stereo stays on when the key is off, all gauges except the mph and rpm are not working, the ABS and Battery lights are on, interior lights don't automatically come on and there is no beeping when the doors are open, also I can only control the driver side front window from drivers door panel. All of this only happened after the install.. Any help in figuring out the problem would be greatly appreciated..

PLEASE HELP!!!

2005 Silverado 1500