One problem related to turn signal has been reported for the 2017 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2017 GMC Yukon based on all problems reported for the 2017 Yukon.
The rear passenger light assembly has failed. No lights within the housing are currently working. The unsafe condition exists when the vehicle is in motion, as it has no running lights, brake lights or turn signals. This appears to be a very common problem for Yukon's of this year, which are still fairly new.