Stabilitrak light on and RPM gauge not working

Same thing happened to me today ...how did you fix it ?

Same thing happened to my 2014 SLE Terrain. The stabilitrak light was on and rpm's not registering prior to a crankshaft position sensor change so I took it to a mechanic and they said it was the timing chain that had to be replaced because it was not in sync it was causing all of these other errors. Once they changed the timing chain and calibrated the problem was fixed.

found eco switch uses the same 5v ref and it got wet and caused the crank sensor signal to fail.