2002 envoy Brake LightsOut

My 2002 /envoy Brakes lights went out at the same time.Changed bulbs and checked fuses, still dont work!
Any ideas.
Also how to reset the oil life and need oil change dash light.
Thanks for your Help

There was a recall for the tailamp circuit boards, check to see if your truck was done with a GMC dealer. Key on, step on throttle pedal to the floor 3x in 5 secs to reset the lite.