04 Tahoe right side turn signals

[jpjones55]

My 04 Tahoe is blinking fas on the passenger side, but it's the front and rear blinker are both blinking fast. So probably just change both out?

Thanks. New to the form.

 

[treehan77]

Check bulbs first. If still goofy, might want to check the lighting block just in front of the rear wheel up in the body, it’ll do some weird stuff if it has some corrosion. Replacement is about $15-20, but I cleaned one green pin on mine 4 years ago with no issues since. I assume you are using normal bulbs and this is not related to LED turn signals.

 

[MassHoe04]

You say both are blinking fast... I take that to mean that main turn signals do light up, just doing it fast.

One possibility to check...
Up front the turn signals have the two amber bulbs that do the "switchback" alternating between the one facing the front and the one on the side. Maybe the side bulb is out, but you didn't notice because the main flasher on the front was working? Take a look. Won't cost anything.

I would buy bulbs front and back anyway; and keep what isn't needed in the glove box. Bulbs always go out on a road trip or on a weekend after all the parts stores close. Good to have them ready.