The exterior lamps turn off about 10 minutes after the ignition is turned off, if the parking lamps or headlamps have been manually left on. This protects against draining the battery. To restart the 10-minute timer, turn the exterior lamp control to the off position and then back to the parking lamp or headlamp position.
To keep the lamps on for more than 10 minutes, the ignition must be on or in ACC/ACCESSORY.
Battery Power Protection#11-00-89-007C: Warranty Administration - Revised Exterior Labor Operations (Labor Only-No Part Replaced) and Required Warranty Claim Submission Information...
Subject:Warranty Administration - Revised Exterior Labor Operations (Labor Only - No PartReplaced) and Required Warranty Claim Submission InformationModels: 2014 and Prior GM Passenger Cars and Light Duty Trucks This bulletin is being revised to add the 2014 model year and update the Labor Opera ...