http://www.vauxhall.co.uk/vaux/static/pdf/manuals/Vectra/Vectra_OM_Feb07.pdf
Why should I know?
On Vectra C 04 model, the steering pump is located inside the rear wheel arch, quite an easy job to do really however the pump if new will cost you around £450, after fitted the car must be taken to vauxhall dealers to have the steering calibrated and only this can be done with tech 2 software,only then will the stering wheel light go out on the display.
Bottom left of engine near the pulley wheel
It's under the right hand side of the steering wheel.
Bottom left of engine near the pulley wheel
if its a vectra b (95 -01) then its under the steering wheel there is a recess you put your hand in and pull it. on the cover you pulled off its stamped on there?
under drivers wheel arch very tight space.
Cruise control is on...... activated by the buttons on the end of the indicator stalk - read your manual
needs new steering colum
under the stering wheel
try in front of the back wheel at the drivers side. just where the fuel lines leave the tank and head for the engine..
Its under the headlight, in the front of the wheel arch on the Right hand side of the car. You need to remove the inner wheel arch guard and you will be able to see it tucked under the headlight.