Turn signals work...but they flicker really slow

Always the simple solution, check the bulb

Hey Ronald, Try reseating the LED Bulbs. Depending of the bulbs a polarity change might cause them to flicker faster.
The original bulbs were working off a flasher or relay already. Put Hazard signals On see if the same thing happens. Or simply get the original bulbs back in.
You can also try calling the manufacturer of the LED light bulbs with the model number.Let me know what happens.
Good Luck,
JP
PS I have added a link that may help you. https://www.superbrightleds.com/blog/led-turn-signals-blinking-too-fast-hyperflashing/275

Sounds more like a bad bulb socket. The bulbs provide a load which causes them to blink slowly. If just one bulb becomes disconnected the load changes and so does the flash rate. I would suspect that you have a bulb that is coming loose in the socket periodically thereby changing the load. Many vehicles us multiple bulbs in the rear...ex. my 04 grand am does the exact same thing. It uses 2 bulbs per tail light. One of the bulb sockets on the drivers side sometimes loses connection and they flash really fast (the other bulb flashes...just 1 of the two quits). In my car i need to replace the tail light assembly.

Even after bulb change, do all lamps work? Bad ground can be shown by weak or dim bulb sometimes and this can cause fast flashing. All bulbs which flash must be working and of normal brightness which is sometimes hard to tell when they blink really fast.

was the correct bulb used? this sounds like a single function bulb was used NOT the bulb that will light with the headlights and ALso produce turn singles

Replace the turn signal switch. All the exterior lights except the high mount brake light run thru it.

This usually means that the front, or rear turn signal bulbs is bad...also some turn signal tail light bulbs are multi-purpose...same bulb lights for turn signal and brake light...You should be able to remedy this for the cost of a bulb...your owners manual and the parts counter rep can confirm the correct replacement bulb...Hope this helps.

Normally with the blinker blinking really fast, it's telling you that one of the bulb is blown, front or rear signals. Check your fuse, and fuse relay to see if it would fix the promblem

flashing fast is because only one bulb is working. look for power to front signal light and check ground wire

You'll need to replace the turn signal switch. I had the same problem a few years ago and replacing the TS switch made everything OK