Brake controller gmc etrailer yukon install 1999 enlarge click Brake wiring controller kit etrailer installation way controllers following information
Brake Controller 7- and 4-Way Installation Kit (ETBC7) | etrailer.com
2006 Chev 1500 Brake Circuit Diagram
How to install a brake controller on a 1999 gmc yukon Brake controller 7- and 4-way installation kit (etbc7)