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Vehicle Overview
GM says the Sierra 1500 Hybrid's gasoline V-8 and electric motors team up for an overall mileage improvement compared with the regular Sierra. The Sierra Hybrid is only available as a rear- or fou ...

Noise
One thing those shoppers might find objectionable is the noise — specifically, wind noise and outside noise intrusion. Wind noise, an issue on highways, wasn't extremely loud, but there was a no ...

When to Change Engine Oil
This vehicle has a computer system that indicates when to change the engine oil and filter. This is based on a combination of factors which include engine revolutions, engine temperature, and mile ...