First my turn signals are not working on my 2005 Silverado. I have replaced the rear turn signal bulbs, front are operational, I replaced all the turn signal fuses and the module, I even tried new flasher relay's. Any suggestions.

My DRL also are working, replaced bulbs and relay.

All other lights and the 4 ways are working.

Any suggestions,

 

what conditions are you checking the dtrl? if the high or low beams are on, the dtrl are switched off.
the truck must be running, in drive, e-brake released and daylight present at the ambient light sensor. fluorescent lighting will not be detected by the light sensor.

 

Have you checked the multi function switch for any melted or burnt wires or plug this is common in fords....