I've seen the Haynes, Chiltons and Factory GM FSM'*. The Haynes is quite basic and you may find most of what you need. The Chiltons is more comprehensive and still lacking in more advanced repairs. The FSM has every nut, bolt, fastner and clip torque spec. Even a corner light bolt has a torque spec. it will tell you the location and color of every wire, conduit and splice if you need electrical schematics..this is the book for you. The one downside to an FSM is that you will find a reference for tool J687264 only to find out it'* a standard torque wrench or another common tool would work for the situation.
For the oil change at hand.. the Haynes might get you through it, the FSM or Chiltons would give you the detail.
In regards to ramps. I like the composite Rhino ramps or the like. Lightweight, easy to work with and they are rated for more than our cars should ever weigh.
00 Regal GS: All kinds of cool stuff.