turn signal / brake light issues on 06 tahoe

[justinvan]

I got in the truck to go to the store tonight and hit the turn signal for the right and it flashes fast. Hit it for the left and it was not as fast but seemed faster than normal (i think all signals were flashing dimly). Brakes make the mirror turn signals light up. Turn signals flash the third brake light along with the right/left indicators on the dash. License plate lights flas as well. Am i looking at the flasher module being bad or a ground issue? I am pretty good with electrical, but its cold as hell here now and would rather start with the more common issues if there is something known.
Thanks in advance for any tips,
Justin

 

[MO Viet Vet]

Check the basics first with checking for good grounds and good bulbs.

 

[rockenthebowtie]

Its either going to be the flasher module or I'm betting more on the tail lamp junction block thats on the left frame rail the easiest way to locate it is to just follow the left side tail lamp harness and it will lead you right to it.. disconnect the connectors to see if there all corrosive due to exposure to the elements of weather especially snow