MPG Surprise! Can The 2020 GMC Sierra 3.0L Diesel REALLY Get Up To 30 MPG In The Real World?

2020 GMC Sierra 3.0L Diesel

We hit the road for a 100-mile loop to find out exactly how efficient the 2020 GMC Sierra new 3.0-liter diesel can be.

2020 GMC Sierra 3.0L Diesel Gallery





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