The dreaded... Service Trailer Brake System ... Beep Beep

[fjtort2]

2015 2500hd 6.0. Is starting to do the Service Trailer Brake System while driving with out a trailer or anything plugged in. Any tips or tricks? Thanks!

[MSD Z-71]

I had the same problem. I changed out this part....ACDelco 84108373 SWITCH ASM-TRLR BRK CONT BLACK https://www.amazon.com/dp/B06XH6PD2X/ref=cm_sw_r_cp_api_i_qAIPEbQNMDMGD

I did this in January 2019 and I have not had it give me that alert since the replacement was made

Edited April 27, 2020 by MSD Z-71

[MSD Z-71]

I also purchased this module 
https://www.ebay.com/itm/184174933655

I chose not to install because replacing the controller seem to have fixed it 

[dbunke]

Mine was doing it during some nasty rainy snowy slushy days this past winter. I suspected moisture in the plug. It appeared mostly dry but I sprayed wd-40 liberally in there and it has not come back since...

[94yj]

i have had the same thing on my truck all i did was move the controller slide knob and it always cures the problem happens on mine about 2 times a year