Need advice from o/o that have purchased used trucks

looking to buy my first truck, I've been a driver for a number of years over the road, I think i'm ready to make the jump from company too o/o with the company i currently work for, they will handle most of the permit, ifta, registration and other paperwork aspects for me, and its my understanding i can get the bobtail insurance through them. I've read plenty of threads on what to avoid when buying a used truck, but the question I have i haven't seen addressed yet

On most truck ads it shows the mileage, but it also shows ECM mileage, and my question with this truck im looking at, is the ECM has been replaced and it has 0 miles on it, so I'm wondering from the owner operators in here would you avoid a truck just because of an ECM change (possible problem child truck), or would you see that as a plus ... a part that won't need to be replaced anytime soon?

Any advice would be greatly appreciated

 

Okay so I read somewhere about the whole dino thing, so you're saying any truck i buy i should have an oil analysis and a Dyno done to it. The truck I'm looking at I would be purchasing through arrow truck sales, and I believe they already do the DOT inspection, ECM check for errors and all that good stuff before they even put it on the front line to be sold.
Would i still need the dino, and if so how much does that cost, and who does it for big rigs?

 

considering i'm purchasing it through a reputable dealer, and i might even pick up an extended warranty on it , do you really think it's still necessary to do the dino?

 

Also when purchasing it through a dealership like this, should they be able to provide maintenance records on the truck since they know the fleet that it came from, or if requested would they be able to obtain those records?

 

Apologies but I could not understand the first part of your message I'm assuming your voice texting , you might want to proof read, but from what I did gather from your message... I'm not looking to skirt the whole emissions laws by buying some very old beat up truck, I'm looking at a 2015 Volvo with the 500 horsepower Volvo engine 3:36 gears and a 13 speed transmission. I want a truck that looks good inside and out, and that is also mechanically sound and able to go into California