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I finally made a write up of my 2008 Chevy Tahoe DRL Blinker Switchback LED Rewire.
Check out the YouTube video below to see how it looks and instructions are listed below.

Parts:
–(2) Epoxy Rectifier Diodes #276-1141 By RadioShack
–(4) White and Amber Dual Color Switchback 3157 3155 3457 4157 LED Bulbs with Projector
–(2) 3156 3157 Pre-Wired Harness Sockets
–(2) 50W 6ohm Load Resistor
Instructions: