1996 GMC Suburban turn signals

Electrical problem
1996 GMC Suburban V8 Four Wheel Drive Automatic

I have a 1996 GMC Suburban with turn signal problems. Both the signals and the reverse lights are not working. The rear lights will flash with the brake pedal depressed and I move the turn signal up and down. The hazard lights work on all 4 corners.

It does and I’ve checked the following-
Checked fuses
Checked relay
Disconnected trailer lights
Checked light bulbs

Any other things I can try?

Thank you.