My buddy had a 2500 with a 4.8/4L60E and it seemed to do fine overall with his landscaping trailer. I'm not gonna say it's doing 0-60 in 5.9 seconds but it was plenty good for the job. He had a 20 foot trailer with sidewalls and would stuff a bunch of mowers, fuel etc. in it.
woulda been an 80e im betting...