Three problems related to turn signal have been reported for the 2015 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 GMC Sierra 2500 based on all problems reported for the 2015 Sierra 2500.
Right rear turn signal bottom socket heats up and causes an open to the top turn signal socket so the top turn signal quits working and causes the system to hyper flash. And indicate inoperative right rear turn signal in message center. Only repair is to replace wiring harness and sockets. System works fine in cold temperatures as the socket does not heat up enough. Happens with vehicle stationary and in motion. Contacted gm about it and got nowhere.
Drivers side, in-mirror (with extendable, manual, trailer mirror) turn signal too bright or should be shielded from drivers eyes. Blindingly bright for making left-hand turns. Problem worsens as ambient light is reduced.
I have the tow mirrors and they have led lights in the mirrors for blinkers and they are extremely bright! when you use your turn signal at night they are so bright that they make it so you can not see on coming traffic very well from the sides of the pickup while at a intersection or when you are trying to change lanes. In my opinion this is extremely dangerous. The blinker leds should not shine directly into the drivers eyes.
| Headlights problems | |
| Turn Signal problems | |
| Exterior Lighting problems | |
| Fog Light Switch problems | |
| Headlight Switch problems |