Dang it's tough to diagnose a squeak but the most common on the 700 is probably the door latches or the dump bed mechanism. I would investigate these areas first. The way I'd do it is drive 5 mph to make it start squeaking, then hold your door open. Still squeaking? Have your wife open hers. Still squeaking? Pull the lever to dump the bed. Hopefully one of those actions at least identify a the source of the squeak. Then you can determine how best to fix it, @Lynn I think has a thread on how to stop squeaks somewhere. For the dump bed latch I think you just wrap electrical tape on the latch pin. I hope some of this is useful, good luck!