OnStar Services

See also:

Under the Hood
Available only with rear-wheel drive, the 3.6-liter V-6 engine produces 255 horsepower and 252 pounds-feet of torque. Cadillac's 4.6-liter Northstar V-8 generates 320 hp and 315 pounds-feet of tor ...

Tire Rotation
If the vehicle has non-directional tires, they should be rotated every 12 000 km/7,500 mi. See Maintenance Schedule. Tires are rotated to achieve a uniform wear for all tires. The first rotat ...

Vehicle Speed Messages
SELECTED SPEED LIMIT EXCEEDED This message is displayed when the vehicle speed is greater than the set speed. See "Speed Warning" under Driver Information Center (DIC). ...