My cruise won't set, although the CRUISE light comes on. The dealer claims it's the CC module, and quoted me $850 for it, installed. I know that I can get the real OEM part for under $300 from some places, and I doubt it will take hours to install. Should I try this myself, or is it less straightforward that it seems (the mount, the throttle control cable, and the harness)? Should I get the repair manual? I rarely work on cars myself anymore-- this particular incident just gave me sticker shock.