FLAT ROCK, MI – The GMC Sierra’s Duramax diesel beats the competition on paper, but would its higher ratings prove out head-to-head on the test track? Sometimes numbers don’t tell the whole story.
FLAT ROCK, MI – The GMC Sierra’s Duramax diesel beats the competition on paper, but would its higher ratings prove out head-to-head on the test track? Sometimes numbers don’t tell the whole story.
