wiring diagram help

[diesel1114]

hey guys im messing around with the idea of using a stock fog light switch or a rear cargo light switch from a sierra to use as my switch for the tailgater mod so my reverse lights come on with the switch as well as the hid h4-2 reverse light mod, also i am looking for the interior lighting diagram , can anyone help me out> does anyoen have this on pdf or acrobate file maybe ? its for my 05 yukon sle wit 5.3

any help is greatly apprecited
thanks


john in nyc