daytime running lights

2006 Chevy Tahoe 5.3L base trim I recently failed the State safety inpection in Virginia because my Daytime running lamps don't come on. In diagnosing the issue I found that the DRL do light when the ambiant light sensor is covered or at night for a 30 second delay when using the key fob to...

Hi all, I've been through all the threads on mostly how to disable the DRL's, I'm having the opposite issue...mine are inop. Here's the details... 08 Suburban...someone did motor swap to the truck, and it had some front end damage. It's got AEM cold air & full Gibson exhaust & ECM/TCM...