See also:

Dual ball joints, five links and a limited-slip diff
Up front, a multi-link double-pivot suspension - based on the MacPherson strut design - is used for a more precise feeling of control, including more linear and communicative steering, and a smoot ...

Tips and Troubleshooting Chart
...

Place a Call Using a Stored Number
1. Push . System responds: “OnStar ready.”. 2. Say “Call <name tag>.”. System responds: “OK, calling <name tag>.” ...