2013 GMC Yukon Denali Xl

The contact owns a 2013 GMC Yukon Denali XL. The contact stated that while at a stop light, the vehicle suddenly started fluctuating while idling. The A/C was activated and the contact noticed that the vehicle was not being cooled inside the cabin. The contact stated that the failure recurred the following day. The contact stated that while attempting to make a right turn, the vehicle lost power steering functionality. The contact turned off the vehicle and shifted into park(P). The contact restarted the vehicle and the A/C unit independently turned off. Additionally, the vehicle regained power steering functionality and the vehicle idled as designed. The contact had not taken the vehicle to the dealer to be diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 138,000.