Hey guys,when it gets cold outside,I'll go out to drive the truck,and find that the turn signals are not working. I did replace the turn signal/flasher relays,and still have the issue. I'm thinking maybe GEM module now ?

 

NO....the GM has nothing to do with it.
Turn signals don't need any special control but left or right on from the multifunction switch, the flasher and the 4 way flash switch.
Good luck

 

I had same problem on diff brand, turned out to be multi switch on column.

 

My truck is starting to that this year as it starts to get cold I assume its just the switch I plan on getting one used maybe it will work for a couple years

 

Dont wait to long! Mine went out completly while doing 60mph at 4am. Sicne hi/lo for headligts go thru it they went out as well!