It's hard to say my first few test drives the water in fuel light was on and it was chugging a bit. When I changed the filter and took it for a ride New year's day I really couldn't get on it with all the other cars on the road. I will say it accelerated probably better than the crew cab but that truck is 10500lbs and this one is a lot lighter. I rugged it on the dirt road next to my house from a dig and it spun bolth wheels. Another thing is I'm not shore that hairdryer showed up to the party I don't hear it spooling like my old dirtymax .... I miss that truck... Anyway the new alternator and shocks came so I'm going to try and do that tomorrow.How is it for power? Even though the 6.5 TD had many issues, power was much better than the 6.2. I have no idea why GM put the 700R4)4L60E in all the 1/2 ton version's of their trucks, maybe better acceleration and better overdrive gear vs the 4L80E?