GMC's Sierra 1500 will add a carbon fiber bed, 3.0L Duramax turbo-diesel, 10-speed automatic transmission, and other technology for the 2020 pickup, GMC has announced.
GMC's Sierra 1500 will add a carbon fiber bed, 3.0L Duramax turbo-diesel, 10-speed automatic transmission, and other technology for the 2020 pickup, GMC has announced.
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