alright, same thing happened to me when i got rear ended in my car back in march. LINK
the damages were appraised at $4,175. they told me that in virginia they can't legally pay to get it fixed if the damages cost more than 50% of the appraised value of the car. b/c of this, they deemed it as totaled and gave me two options, take a check for $5,400 and they keep my car, or take a check for $4900 and I get to keep my vehicle. Nothing was sent to the dmv nor carfax/autocheck saying it was totaled(in my case), only that it was involved in a rear end accident. I also got the whole thing fixed for $3,600 so I got to pocket the extra money. This worked out in my favor and the same thing might also happen in your case. They might end up paying you more for than what it costs to repair the vehicle, and let you keep it. So if they want to total it, let them and keep your truck. They can't take your truck from you - ever. Just make sure you know what your options are.

Also, if they offer you a check for you your truck and let you keep it try to haggle with them so they'll give you more money. I got them to give me an extra $400 that way.

Oh, and ask for a rental just for the hell of it, most of the time they'll give it to you for free(i did this twice, once in the rear ending accident, and another recently when my car got hit my a shopping cart in a parking lot). I mean, wouldn't you rather put wear and tear on someone else's vehicle and get better gas mileage?