No rear break lights

The circuit goes from the brake light switch thru the turn signal switch and uses the same bulbs as the rear turn signals. I would check for power in and out of that switch next.

i don't know why but dodge trucks back feed threw the trailer lights and leave light on

just an idea but if you have a trailer connection confirm that your grounds are all ok~!!

sounds like a bad turn signal switch . both side brake lights run through it but the third brake l;ight runs direct from the brake light switch .- play with the hazard button a few times and if the start working you need the turn signal switch

could be a few reasons...first check trailer wireing harrness..if none or ok then replace the curcit board in the tail lights

i believe the trailer brakes run off the same fuse as the tail lights no extra fuse all the ones ive seen the trailer lights just fuse into the wiring harness of the rear tail lights so if your brake and turn signals works your prob is gonna be in the trailer lights them self or your connection in the wiring right behind the rear bumper. Hope this helps

test your brake switch located on the brake fulcrum. you can unhook the wires and usea paper clip to connect the two wires together if the brake lights come on then replace the switch, if it does not come on and the bulbs are ok then replace turnsignal switch.

Does the turn signals or hazards work in the rear?? Yes... it may be the brake switch or the turn signal switch (power goes from battery, to the brake switch then to the turn signal switch, then to the lights. No? .. again.. possibly turn signal switch or the wiring between cab and bed.

you prob got a trailer plug prob bad wires if not tail lights run through turn signal switch tell fix ya bout me ok

Chevy trucks are known for wiring trouble most likely there is a wire shorted out under the carpet. Always test first though before ripping out interior lol