Detroit has long been ground zero in America's pickup truck war. GM, Ford, and FCA all call the city (or its suburbs) home. Their respective full-size pickup trucks are also huge sellers. The Ford F-150 has been America's best-selling vehicle for years and the Ram 1500 recently beat out the Chevrolet Silverado 1500 for the second-place sales slot. Needless to say, Chevy didn't take too kindly to that and Silverado 1500 improvements are coming. The GMC Sierra 1500 will also receive these updates, which will supposedly include a brand new interior.

But according to Muscle Cars and Trucks, the diesel variants for both of GM's full-size pickups are rumored for another vital upgrade: towing. John Barta, assistant chief engineer of diesel engine controls at GM, told MC&T the main priority for these diesel offerings was top fuel economy, but that came at the expense of towing ratings.