Speedometer started swinging and then slowly pegged at 100. Tachometer reads 0 no matter what. Check gauges light flickering and trans won’t shift. I can manually shift between 2 & 3, but it won’t shift on its own and won’t go into OD or first gear (manually) just started this on my way home from work. Transmission rebuilt 2 years ago, only put about 4000 miles on it since. Fluid level is good. Replaced the VSS, no change.Going to pull the cluster next to check the ribbon cable connection. Trans was fine before the gauges started acting up. 1995 K1500. 213,000 miles. Thoughts?