1. When cold, turning the headlights on will result in immediate
headlights, but a 10-20 second delay in the dash lights.  At the same
time, there will be a 10-20 second delay in taillights as well.
--Headlight switch was replaced.  Same issue resulted.

2. Typical "sensitive" dash gauges.  Any draw on power to the dash
will result in the gauge needles jumping.  When I turn on the turn
signal, the volt meter jumps +/- 5 volts with every blink of the
signal, and the speedo will jump a hair for the first blink or two of
the turn signal.
--Truck has 2 new dual batteries and a good alternator.