Could be a bad switch or shorted wiring. Could also be a key fob issue. A good scanner that shows actual values would help in diagnosis. Use this link to find a good shop near you.
https://repairpal.com/repair-shops
Alex
RepairPal Certified shops can diagnose and repair your 2011 GMC Yukon. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.