Top 10 Top 10 Most Fuel-Efficient Pickups in 2023 by Guillaume Rivard September 2, 2023 Photo: Antoine Joubert2. Chevrolet Silverado 1500 Duramax and GMC Sierra 1500 Duramax 3L 6-cylinder diesel engine, 4x2 Combined fuel consumption: 9.2 L/100 km (4x4: 9.8 L/100 km) « PreviousNext » Share on Facebook Share: