Yes, the 2000 Olds Silouette has an engine oil cooler, as well as a transmission oil cooler for the automatic tranny. The engine oil cooler is built in to the engine oil filter housing. Water/coolant enters from the engine block, circulates around the filter housing and exits through a tube to the lower intake manifold. If an engine starts getting oil in the coolant and coolant in the engine oil, this could very well be the source of the problem. An internal leak.
The oil pump is located on the bottom of the 2003 Silhouette engine. The oil pan has to be removed to get to it.
4.5 Quarts of oil.
5 w30
4.5 quarts
It is either an intake gasket, or head gasket most likely...bring it in to a mechanic.
Push the odometer trip reset till you get to "oil" then press and hold down till it reads "100"
no
5w30
20 ft pounds should do it. too much and you'll strip the theads
if it has a 3.1 or 3.4 it is located between the engine and the trans just above the oil pan.
4.5 quarts with new oil filter
15 mm