GMC’s full-size flagship SUV looks a little ... and a 3.0-liter Duramax diesel inline-six. Revised for 2025, the Duramax generates 28 hp and 35 pounds-feet more than before, for totals of ...
The 5.3-liter is standard on the LS, LT, RST, Z71, and Premier trucks, and the 6.2-liter ... get-it-to-open dance quite right ...