Left blinker/brake light inop

[Kyleryan1990]

Hi everyone I have had one hell of a time with my 2014 Silverado lately the driver side blinker and brake lights do not work however they light up when running at night just no blinking action the entire taillight assembly is fine (I switched it to the pass side and all worked properly) also I have a tailgate light bar and the left turn signal and brake lights work just fine (plugged into my trailer I disconnected the harness that runs from the light to the rear of truck and it looks just fine does anyone have any idea of where to go next,, 

thank you

[kgkern01]

On 4/22/2019 at 6:29 PM, Kyleryan1990 said:

Hi everyone I have had one hell of a time with my 2014 Silverado lately the driver side blinker and brake lights do not work however they light up when running at night just no blinking action the entire taillight assembly is fine (I switched it to the pass side and all worked properly) also I have a tailgate light bar and the left turn signal and brake lights work just fine (plugged into my trailer I disconnected the harness that runs from the light to the rear of truck and it looks just fine does anyone have any idea of where to go next,, 

thank you

Did you ever find a resolution to your issue?  I'm having the same problem, and already replaced the BCM and it didn't help fix my problem.

[Spendit]

Mine was the right side, fought with it for a year - bulbs in and out, cleaned all terminals and checked all connections - I replaced that side harness with new and has been fully functional for ~year now.

 

Sierra, 2014, double cab too