i think as with all vectras it is a n.o 45 torx/star bit on the sump hope this helps
It has to be at the base of the sump, otherwise the oil would not drain from it.
yes you can but you'll need to cut off the indicator locating bracket
There isn't one, you have to remove the pan to drain the fluid.
At the bottom, or rear fo the radiator or remove lower radiator hose.
No. If you have c.o.p. ( coil on plug ) just remove the coil, there's the plug.
Should be at the bottom or rear of the radiator or remove the lower radiator hose
You'll need a 5/8" socket.
behind the drivers side front wheel.
Should be at the bottom or rear of radiator or remove the lower radiator hose
Drain the excess oil out. Remove the drain plug.
Disconnect the battery, and remove the spark plug wires one by one. Replace the spark plug wires in the same order, ensure the connection is firm, and connect the battery.
on top of the engine, remove the plastic covering that houses the spark plug wires.