Robbie -- Just went out to my truck to drive it down to my garage where I could pull the cable, and the light didn't come on. Oddness.
Even MORE odd, maybe, was that the local garage tried to scan the light to see if it would pinpoint the code issue, since the light was staying on, but their scanner only went up to '07 models. The guy tried some different things, but nothing worked (then). So, I headed back to work, thinking I'd have to go to Plan B at some point -- and realized that my turn signals weren't making any noise (and that my sub wasn't on, and so my amp clearly wasn't on...). I wondered if the guy at the garage had messed something up beyond unsuccessfully clearing the light, but everything was back to normal when I just went out to my truck.
I don't know WHAT the heck just happened, but I'm crossing my fingers that all is right again. Damn computer-driven everything....