1997 cadillac deville theftlock activated bose stereo

Use a scan tool to reset the anti-theft function in the radio.

Go into Google and enter "resetting Vat" You will find the PIA procedure.

the diagram should be affixed to the top of the stereo

its locked... you need the VIN and call the dealer to give you the code

You may be able to get the code from the dealer.

Here's your color codes at least. I hope this helps you and good luck.

1997 Cadillac Deville Stereo Wiring Constant 12V+ Orange Switched 12V+ Yellow Ground Black Illumination Gray Dimmer Brown Antenna Trigger Pink Antenna Right Rear Front Speakers 5 1/4" Dash Left Front (+) Tan Left Front (-) Gray Right Front (+) Light Green Right Front (-) Dark Green Rear Speakers 6" x 9" Rear Deck Left Rear (+) Brown Left Rear (-) Yellow Right Rear (+) Dark Blue Right Rear (-) Light Blue

If the stereo was removed, the speakers may have been removed as well. Did you check if they are there?
Also, you need to make sure the car didn't have a Bose system installed - that system adds an amp between the radio and the speakers, and if the amp is in place, your aftermarket radio can't use it (if it is there or has been removed, you will have to bypass the connectors at the amp location so the wiring at the radio can reach the speakers directly).
In any case, you need to find and look up the entertainment system option installed when the car was built, and the get a wiring diagram for that system (try Alldatadiy.com).

yes you can have the dealer unlock the unit, they may charge for this, some do some don't

You need to enter a code from the cadilac dealer

I have a Cadillac caters 2001 I switch out my stock radio Bose to a jvc deck. The deck work but no sound coming out