I'm dealing with a similar issue right now.  This seems to be common
enough that there should be a technical service bulletin or something
but there isn't.  I don't have the solution yet, either.

I purchased Alldatadiy for the year and was able to find a ground
distribution map to see if I can find a commonality between the fuel
pump, power windows, and power seats.  They all go at the same time.
My first suspect was a ground in the driver side kick panel.  That
turned out to be a dead end.  I was able to disconnect it while the
engine was running and the engine didn't die.  The next suspect ground
is a wire that attaches to the block near the oil pressure sending
unit.  I plan to take a look at this one tomorrow.

Some other symptoms that my vehicle has that may or may not have
something to do with the problem:
Oil level light goes on when oil level is fine.
Periodicaly get transmission code P1870 which indicates that the
transmission is slipping.  A bad ground could lead to a false sensor
reading being misinterpeted by the computer.
Fuel gauge is not accurate.  The tank is nearly empty when the gauge is
reading 1/4 tank.