The thermostat is located below the intake plenum assembly, on the passenger side. I believe you can see a part of the thermo from the pass side. It is a labor intensive process to replace it, hence the ~$300 repair quote from dealership. A lot of engine components have to come off to get to the thermo. The trickiest part of the replacement is finding the tool to undo the hose clips that hold the rubber on the plenum. These clips are called clic-R collar hose clamps. I've found a few vendors on eBay who sell the tool, but can't find it in/on any tool website. This guys eBay store seels the tool. http://stores.ebay.com/KONIKTOOLS CLIC-R COLLAR PLIERS 1212
Saturn vue V6 lifter noise when first started
On a 2008 Saturn Vue , you don't mention the engine size , but the 2.4 liter four cylinder uses a timing CHAIN ( also the V6 )
V6 motor calls for 5w-30.
2004 saturn vue v6
You can put upto but no more then 5 quarts into the 2002-2005 Saturn Vue V6
5 quarts
5W30
134 A is used in the 2002 Saturn
According to the Gates website ( they make timing belts etc . ) the 3.5 liter V6 engine in a 2007 Saturn Vue has a timing BELT
I know that the 3.5l V6 engine does.
inside gas tank
under the hood