Best manuals/reference materials?

Well my '03 now only has 42,000 miles on it but it needs all the fluids changed out. And I am interested in getting everyone's input on the best repair manuals for this. I have been holding off buying the Chilton/Haynes manuals because they seem to cover many different vehicles. I realize the covered vehicles are very similar but I would like the pictures and such to look like my vehicles looks. I am open to printed materials or online info, not really locked in on one or the other. Thanks in advance for any input.

OEM GM Shop manual.... helm.com

Alldata is nice, and you don't have to worry about the pages getting dirty :)