Last year, I ran to the rock yard and had 3/4 ton of rock dumped in and then 15 landscape bricks thrown in to start my project on the side yard. So about 1680 lbs in rock and then another 300 lbs in bricks (guessing)...1980 lbs total and we sagged all the way back to the house. Engine and trani could have cared less, but the ride was a little less then what I would like. IMHO, shen it comes to bed weight, the 04.5 i had sat better then the 06 i'm running now.