New for 2011

The Sierra Hybrid gets GM's OnStar 9.0 telematics system that GM says provides better voice recognition. GM also said they have worked to cut down on the amount of wind noise occupants hear.

    See also:

    Overview
    GMC announced the all-new 2007 Acadia. It is GMC's first crossover, delivering a smooth, responsive driving experience, athletic design, a spacious interior and a comprehensive safety package to t ...

    Special Application Services
    • Allison Transmission™ Vehicles Only: Replace external transmission filter at first engine oil change only. • Vehicles with Dual Wheels: Check dual wheel nut torque at 160 km/100 mi, 1 600 km/ ...

    Transmission Messages
    SERVICE 4 WHEEL DRIVE If the vehicle has four-wheel drive, this message may display if a problem occurs with the four-wheel-drive system. If this message appears, stop as soon as possible and turn of ...