These are drop in replacement switchback marker lights for the 2015 new style GM tow mirrors fitting Silverado and Sierra. These will illuminate as a white LED strip during running light mode, and flash as an amber LED strip during signal mode. Also offered in a scanning sequential amber turn signal as an additional option. They are offered with a smoked or clear lens, and the included wiring harness makes installation easy (links to videos are below).

These lights operate as follows:

• Signal (No Running Light): Flashing Amber Signal or Scanning Amber Signal (Sequential Switchback Only)
• Running Light (No Signal): Solid White Strip Light
• Running Light On & Signal Activated (Normal Switchback): Solid white light turns off during signal and amber light flashes until signal is complete. After signal is complete, white light illuminates again
• Running Light On & Signal Activated (Sequential Switchback): Solid white light turns off during signal and amber light scanning signals until signal is complete. After signal is complete, white light illuminates again

These replace the factory lights which are part numbers 23444105 and 23444106. 

Don't want to mess with taking your mirrors apart? We offer mirrors with switchbacks PRE-INSTALLED Click Here To Purchase Mirrors Pre-Assembled.