Interim (or minor) Car Service Guide
The Bounce Test
Other Suspension Units
A Final Look
Whilst under the vehicle have a good look along the full length of brake and fuel pipes and hoses, any damp areas must be investigated and rectified, particularly in Vauxhall parts, check also the security of these lines ensuring that they are clipped firmly to the floor pan. On the subject of brake and http://www.carsparefinder.com/features/how-to-replace-fuel-lines-in-your-vehicle/ can only be carried out with the engine running and the brakes applied.
One final word, although this should really be the first, is that of safety. Work on the underside or indeed any procedure involving raising the vehicle should be done on a hard concrete surface using a trolley type jack operating well within its lift capacity and once raised the vehicle must be supported by correctly positioned axle stands.