i have started having issues with my burb, ABS, brake trac light comes on and the speed odometer starts bouncing around, it is a intermittin problem, going over rough railroad tracks does not make it come on or go off, it has me puzzled.
also, i forgot that when the lights come on, it shifts hard, like you have a shift kit in it. speed odometer does not act crazy until the abs brake and trac light come on.The ABS/Traction control is usually a wheel sensor or the wire harness.
The speedometer would be the VSS, vehicle speed sensor, and again is the sensor starting to go or the wire harness.