I was going to a friends house yesterday and I noticed that both turn signals dont work. I thought I had a bad bulb but all bulbs are good. At night we had gone to the store and I also noticed that my automatic lights didnt come on. If I manually turn them on they come on. My hazards work also but left turn and right turn dont. I checked all fuses and all were good. Where is the turn signal realy on the LS1 car? Another question, the turn signals and automatic lights tied together?

 

I just had this happen. Damndest thing, too. The left one quit working then the next day the right one quit too. Turned out it was the front turn signal lamps. My lenses are leaking and the water blew the bulbs apart.

But, if you say they're ok, then maybe it could be the blinker module. I'm pretty sure left/right/hazards all use seperate modules.