See also:

When the Light Flashes First and Then Is On Steady
If the light flashes for about a minute and then stays on, there may be a problem with the TPMS. If the problem is not corrected, the light will come on at every ignition cycle. See Tire Pres ...

XM Radio Messages
XL (Explicit Language Channels): These channels, or any others, can be blocked at a customer’s request, by calling 1-800-852-XMXM (9696). XM Updating: The encryption code in the receiver is b ...

Reporting Safety Defects to General Motors
In addition to notifying NHTSA (or Transport Canada) in a situation like this, please notify General Motors. Call 1-800-521-7300, or write: Buick Customer Assistance Center P.O. Box 33136 Detroi ...