I have an 05 Silverado with the 8.1 and it has 435k on the original motor and trans, as does [USER=13882]@adamk[/USER] who has the identical truck with roughly the same miles, all original as well.
The 8.1 pulls amazing. It’ll pull any load up any hill but it can’t pass a gas station. But I don’t mind.
Always check the oil, it’s very normal to use oil a bit more than you may be used to. If it has low oil pressure at idle, don’t be alarmed. Mine idles at 18-20 once hot, stays around 35-38 at speed. It also has a slight rattle/knock sound at cold start up but goes away in just a few seconds.
Always let it warm up before you tow with it, it’s somewhat common to score a cylinder when people just jump in and take off with a load. I usually let it run a few minutes before just driving it period.
Not sure what the price is but if it’s clean and taken care of, inside and out with not a ton of miles it worth quite a bit more than regular Burbs.
