Originally Posted by 05atlanticblue
well i'm not the only one, mine does the same thing every so often. i get them to shut off by turning the key to the on position and off again.
it's not the brake lights that stay on, it is the running lights in the tails only. while on, they will occasionally flicker, when they do i can hear a relay clicking in the relay box under the hood.
mine did it with the stock taillights as well as led units, so it's something in the electricals.
there have been some other glitchy lighting issues when the key not in the ignition - which get reset by turning the key on and off
Given the year of your truck, I'm inclined to think your FCM is on the fritz.