Cylinder misfire code

SOURCE: 2002 Saturn Vue V6 Loss of Power

Yup. The throttle body connectors have a history of failing on these cars. Replace the throttle body and the wire connectors that go to it, and you're back in business. Not terribly difficult and you can get the parts from any dealer. Saturn actually has a bulletin out on this problem but they won't cover it unless you're under warranty - no recall for this.

SOURCE: Saturn SL 2002 High Idle

Intake manifold gasket. Leaking where intake meets head.

SOURCE: 2002 Saturn SL1 rough, sputtering idle - cylinder #1 misfiring

spray some carb cleaner on the passeger side of the intake manifold, right behind the alternator. it is very common for those to leak there and cause those exact problems

SOURCE: 2002 Sayurn vue 3.0L

Under the intake manifold,  it will need to be removed.  Not too hard to do for the average diy but recommend buying a repair manual as a guide.  you will need a 1/4" drive T30 torx socket with a long extension one of the bolts is hidden but the others are under the black cover on the top of the intake.  you will also need to remove the coil pack held on with torx bolts.  8 or 10 inverted torx socket needed for that.

SOURCE: 2003 saturn vue trouble code p1599

P1599 IS A STALLING ISSUE COULD BE BAD GAS / BAD FUELPUMP DIRTY FUEL FILTER
DISCONNECT BATTERY AND SEE IF THE LIGHT COMES ON AGAIN
U2107 HAS SOMETHING TO DO WITH THE COMPUTER LOOSING POWER AT THE BODY MOUNTS CHECK CABLES AND GROUND STRAP