1978 GMC 3500 with a 6BT Inline-Six
This 1978 GMC 3500 Sierra Grande is powered by a turbocharged 5.9 L Cummins 6BT diesel inline-six. A 47RE four-speed automatic transmission sends power to… Read More »1978 GMC 3500 with a 6BT Inline-Six
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This 1978 GMC 3500 Sierra Grande is powered by a turbocharged 5.9 L Cummins 6BT diesel inline-six. A 47RE four-speed automatic transmission sends power to… Read More »1978 GMC 3500 with a 6BT Inline-Six