You could have a bad instrument cluster (which is very common) or the BCM could be at fault.
You can run a self test on the instrument cluster when this happens to see if it responds normal or not. Begin with the ignition key switch in the off position. Press and hold in the Odometer Trip and Reset buttons. Turn the key to the On position. Wait until the word CODE appears in the Odometer window, then release the buttons. A normal self test will step through turning all of the indicator lights on and off and sweeping all of the gauge needles. If this does not happen, th insrument cluster is bad and will need to be replaced. Just be sure that all of the inputs are good.
As far as the turn signals go, you could have a bad Combination Flasher or DRL Module. Both of which are very common!