It is under the back passenger rear seat.
It's attached to the starter.
Green.
did you check the speedometer gear in the tranny?
Grand Cherokee parts would fit Laredo.
What device is it attached to?
Yes they should interchange without a problem.
Dana 35 or Dana 44
Do you live in an area that you need your heater?
the answer is here www.installdr.com I had the same problem.
5.2L and 5.9L where both available.
It does have a computer, no programming should be necessary.
the Jeep Grand Wagoneer was last made in 1991. do you mean the Jeep grand Laredo or Jeep grand Cherokee?