Loading tune in Yukon with push button start!

[WYO-HD]

Picked up my Denali a few days ago and tried loading my Edge C2S. it prompts you to turn key to run position but do not start vehicle. Does any one know how to perform this function when your vehicle has push button start?

Thank you,

 

[Kpwweb]

Push and hold the Start button for about 5-10 seconds until everything turns on. Do not press the brake.

 

[WYO-HD]

Thank you,