See also:

Total Weight on the Vehicle’s Tires
Be sure the vehicle’s tires are inflated to the upper limit for cold tires. These numbers can be found on the Certification/Tire label. See Loading the Vehicle. Make sure not to go over the GVW ...

Reporting Safety Defects toGeneral Motors
In addition to notifying NHTSA (or Transport Canada) in a situation like this, we certainly hope you will notify us. Please call us at 1-800-521-7300, or write: Buick Customer Assistance Cente ...

Collision/Detection Systems
If equipped, select the Collision/ Detection Systems menu and Park Assist will be displayed. Park Assist This allows the Ultrasonic Parking Assist feature, audible only, to be turned on or off. ...