Bit of a weird week. I've a 2008 CTS4 DI that earlier this week the check engine light blinked 3 times and then went out (indicating a misfire as I understand). Ran it for a day planning on doing spark plugs over the weekend. Before I could though, it threw a p430 so I figured I probably blew the cat. Well I just did the spark plugs, cleared the code, and took it for a maybe 10 mile drive with no issues. When I got back I plugged in my code reader and IMMEDIATELY upon doing so the DIC flashed SERVICE STABILITRAK SYSTEM, I read the code and it says p700,. I cleared it, went for another drive got back and upon plugging in the code reader it did the same thing. I cleared the code. I'm not getting even a pending p430 anymore either. Any ideas as to what I should do next? Fearing I may have pulled a wire when changing the spark plugs since this is an issue I've never had prior to replacing the plugs, and the immediacy of its appearance afterward.