Check this out!
They tested stock trucks for the big 3. They didn't have a Dodge Cummins with the automatic so that's missing but they had all 3 for the standard test. Interesting reading, sure wish they had an HO with the 48RE but ah well, there's always next year.
Glenn
Part one 1/4 mile
http://www.pickuptruck.com/html/stories/2003shootout/page1.html
part2: 7% grade
http://www.pickuptruck.com/html/stories/2003shootout/part2page1.html
Part 3: 15% grade
http://www.pickuptruck.com/html/stories/2003shootout/part3page1.html

Glenn
Part one 1/4 mile
http://www.pickuptruck.com/html/stories/2003shootout/page1.html
part2: 7% grade
http://www.pickuptruck.com/html/stories/2003shootout/part2page1.html
Part 3: 15% grade
http://www.pickuptruck.com/html/stories/2003shootout/part3page1.html