OnStar Services

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Vehicle Overview
Buick joined the minivan market for 2005 with the Terraza, which features sliding side doors and a low step-in height. For 2006, the Terraza can be equipped with a new 3.9-liter V-6. Two version ...

Battery
This vehicle has a standard 12-volt battery. Refer to the replacement number on the original battery label when a new standard 12-volt battery is needed. eAssist vehicles also have a high v ...

All-Wheel Drive
Vehicles with this feature always send engine power to all four wheels. It is fully automatic, and adjusts itself as needed for road conditions. When using a compact spare tire on an AWD ve ...