What's small orange light on dash 78 Deville

After having a (bad) tune up done (don't ask) I now have a small round orange point of light that stays on. It's located on the dashboard in the "idiot light" area. Is it an emissions light? How do I get it to turn off?

Thanks for ANY help, Fred Luhn Goldies Plating Service
"New York's Finest Premium Gold Plating Service" online at http://www.goldiesplating.com
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.