Your front right signal bulb is out.
So....you have a turn signal out.... Replace the bulb...I'm now having the fast-blinking issue. My driver's side headlight went out, and so I replaced it. I'm still getting a fast-blink when I signal left, and noticed all left-turn lights blink except for the left one in the bumper. However, that one still lights up regardless. Am I understanding that this could be partially burnt out and causing the fast blink? (What are the chances that the left headlamp and blinker light going out at the same time?)
I also looked here, but didn't have much luck:
https://gm-volt.com/forum/showthread.php?330543-Fast-blinking-turn-signal
Thanks for your help!