See also:

Using the Digit Dial Command
1. Press and hold for two seconds. The system responds with “Ready” followed by a tone. 2. Say “Digit Dial”. The system responds with “Digit dial using <phone name>, please say ...

Engine Co
The cooling system in the vehicle is filled with DEX-COOL® engine coolant. This coolant is designed to remain in the vehicle for 5 years or 240 000 km (150,000 miles), whichever occurs first. The fo ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the v ...