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Rearview camera available on extended and crew cabs
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OnStar gets Turn-by-Turn navigation
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XM Satellite Radio now with NavTraffic
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Allison six-speed automatic transmission
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Duramax diesel performance
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Integral steel, not composite
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Dually fenders
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Towing mirrors
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Independent front suspension on 4x4 models
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Integrated brake controller
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No side curtain or side-impact airbags
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Captain's chairs not available in LTZ Crew Cab
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6.0-liter V-8 isn't E85 capable
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Huge chrome front bumpers
Vehicle Summary
The Chevrolet Silverado 2500HD/3500HD and GMC Sierra HD trucks are built on a more robust version of General Motor's full-size pickup truck platform. The heavy-duty trucks share the same mechanicals, but are differentiated with unique interiors and front-end styling. Both can have a powertrain that consists of a Duramax diesel engine and an Allison transmission, which continues to draw rave reviews. Read more
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