Check engine light not coming on
 

I have a 2005 Chevy duramax I just put a sinister diesel egr delete kit on it. When I was finished I deleted the codes that popped up with my programmer and the codes kept coming back on every time I started the truck, but now the check engine light doesn't come on at all but when I hook up my programmer it still shows codes just wondering if any body has any ideas on possible solutions thanks

Blown bulb