I really don't know how much fluid is left if you don't cycle the module, but I think its more than a negligible amount. I did buy a tool capable of cycling the module, but its a bit clunky so I haven't used it yet.
Cool. Thanks. BTW - What tool did you buy? I've started search'n to see whats available and pricing. Scangauge II keeps coming up as a not so expensive tool.