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Powertrain details
The GMC Sierra All Terrain HD concept is propelled by the new, production 6.6L Duramax turbo-diesel V-8 and Allison 1000 six-speed automatic transmission powertrain combination offered in the 2011 ...

If the Off Indicator Is Lit for an Adult-Size Occupant
If a person of adult-size is sitting in the front outboard passenger seat, but the off indicator is lit, it could be because that person is not sitting properly in the seat. Use the following steps ...

Using Softkeys to Play a DVD-A (Audio)
Once a DVD-A is inserted, the radio display menu shows several tab options for playback. Press the softkey located under any tab option during DVD-A playback. (Play/Pause): Press either the play or ...