I need to know how to replace the light on steering wheel
Light on steering wheel wont come on on 2003 Cadillac DeVille DTS
I assume you are asking about the back lighting in one of the steering wheel switches on your 2003 Cadillac DeVille DTS. If that is the case the light bulbs are not replaceable, you must replace the affected switch. In some cases you can work the switch out with a small flat bladed tool. If that does not work you may need to remove the steering wheel to replace the affected switch.