One problem related to headlights turn off while driving has been reported for the 2008 GMC Acadia. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 GMC Acadia based on all problems reported for the 2008 Acadia.
Passenger side headlight failed to properly function, bulb was changed and still failed to function properly. Problem seems rooted in manufacturer's wire harness not properly functioning.