Fatweed is right if you can it is better to fill it with the bed in the down position if you can. It is easy to over fill these things and make a big mess a small hand pump like what they use to fill rear ends and transmissions will be your best bet as far as fluid I would use AW46 standard hydraulic oil. If you do a search here on the Bolt this subject has come up many times I think Dave (53moneypit) may have even written a tech article on the subject.
