2008 GMC Acadia Owner's Manual - Page 37

For the third row center position, locate the comfort guide which is located in a storage pocket, at the top of the seat, under the headrest on the driver's side of the vehicle. To access the comfort guide, you will first need to move the headrest forward by pulling on the handle behind the seatback. The comfort guide will now be accessible. Pull the comfort guide out of its storage location and then return the headrest to its upright position. 2. Place the guide over the belt, and insert the two edges of the belt into the slots of the guide. Third Row Center Position The elastic cord on the comfort guide is adjustable. You can make it longer or shorter by squeezing both ends of the plastic adjuster. 1-33