I have a 2009 Pontiac g6 with 217k miles. Just a few days ago I was driving and everything was fine. Suddenly I couldn't shift into 3rd or 4th gear. I drove about another 30 miles to get home with it only shifting to 2nd gear. Sometimes it has trouble shifting into first gear and sometimes the transmission will just suddenly slip and I won't get anything. Like I said this all happened suddenly didn't have a single problem before. I scanned it and it says shift solenoid B stuck on. Would I be wasting my time opening it up and replacing the solenoids? Hoping to get at least another few months out of it until I can save some money up for a new vehicle. Never had the transmission fluid changed if that matters.