Disconnect the battery negative. Put chocks on the back wheels to prevent them from rolling, and set your parking brake, as well. Unless you're as thin as an Olympic ice skater, you'll probably need to jack up the front. Do that, and either use jack stands, or let the front tires rest on some wood blocks.
The starter will be located in front of the flywheel housing. Usually, it's on the right (passenger side on a left hand drive vehicle) side of the flywheel housing. Remove the mounting bolts.. they usually are oriented upwards. Pull the starter out once this is done. On the back of the starter, there will be two or three wires connected. You'll need an appropriately sized ratchet or wrench to take off the nuts so you can remove these wires (although not familiar with the Vue, Saturn used a number of GM components, so I'm assuming a 13mm socket or wrench is what you'll need). Be sure to take note of which wire goes where on the starter. You might need to use a slotted screwdriver to get the blade terminals off the studs. Installation is the opposite of removal.
Replace the starter
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If you really don't know where a starter is, I suggest obtaining a repair manual.
replace the starter
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