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2014 Chevrolet Silverado 1500 Z71 LT Crew Long-Term Road Test


Edmunds conducts a Long-Term Test of the 2014 Chevrolet Silverado and reports on its fuel economy.
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Comments
My 14 Sierra 5.3 4x4, 3.42 rear end, crew cab with 6.5 foot box just passed 12K miles also. I have oversize 34" tires and a small lift, so the truck sits 4" higher than stock. I've used Hypertech to correct the speedometer/odometer for the tires, so my mileage figures are still accurate.
That being said, my overall mileage after 12K miles is 20, which is 10% better than the epa 16/22 (18) for the 4x4. I probably drive easier than most, and have certainly noticed the mileage starts to drop above 75. Best tank was 24, but that was the rare exception. Most around town tanks are 18-19, highway tanks are generally 20-22 cruising at 75.
So, yes, you can achieve the epa numbers on the 14 GM trucks, even with oversize tires and a small lift, but you have to keep it under 75.