These two heavy duty trucks are new for the 2020. The 2020 GMC Sierra 3500 HD is an all-new truck with a carry over turbo-diesel V8 and a new 10-speed automatic transmission. The 2020 Ford F-350 is mainly a carry over truck with a thoroughly updated turbo-diesel V8 and an all-new 10-speed automatic transmission. It’s time to find out exactly how efficient and fast these trucks are.
2020 GMC Sierra 3500 HD
The truck being tested is a crew cab 4×4 dually dressed in the top-of-the-line Denali trim with the Denali Ultimate package. Under the hood is a 6.6-liter Duramax turbo-diesel V8 with a rating of 445 hp and 910 lb-ft of torque. This engine is now mated to a new 10-speed Allison-branded automatic transmission and a 3.42 rear axle ratio.
2020 Ford F-350
The Ford is a crew cab 4×4 dually configured with a King Ranch trim. Under its hood is a 6.7-liter Power Stroke turbo-diesel V8 with 475 hp and 1,050 lb-ft of torque. It’s mated to a Ford 10-speed automatic transmission and a 3.55 rear axle ratio in this case.
Here is what happens with we tow 30,000 lbs on our highway MPG loop and put the two into a friendly drag race.