Heated Steering Wheel for 2007 Suburban Z71

[Old_Chevy_Guy]

Have a 2007 Suburban 1500 Z71 and want to add a heated steering wheel. I have the clockspring and heated steering wheel from a 2009 Yukon XL. My airbag from the 2007 uses the older style clip connectors so I am going to modify the 2009 clock spring with the older style connectors for my airbag, but all other harnesses and connectors are the same as the 2007 except for the new heated steering wheel circuit and the air bag connectors. My question is does anyone know if my 2007 has the heated wheel wiring harness like many of the later model (2015+) K series? If not, any thoughts on how to identify the multiplex signal coming off the wheel control button so that I can install the necessary relay and power to the clock spring harness for the wheel heater?  I know this is a random question on an older vehicle, but I just rolled 200,000 on it and think she has at least another 100,000 to go. Thanks for any help you can offer.