This article is from the Toyota Tundra FAQ, by Steve Yee with numerous contributions by others.
To tell the truth: Absolutely Nothing. Motor Trend has a tendency to give the
Truck of The Year award to the manufacturer who does something really
innovative with their model line. This includes styling changes (read,
exterior sheet metal), major engine changes, best value, or major driveline
Each of the major manufacturers have won the same award recently. Dodge won
when they did their "Peterbilt" style design, Ford won when they introduced the
new style F150, and so did Chevy/GMC when they redid the C/K 1500 series in
1999 and the 2500HD in 2001.