On a 2002 Tahoe SSV, almost all the instrument panel gauges are dead. If the trip reset button is held down, they all work and show accurate information. After messing with one of the two plugs on the interior fuse panel, they worked. Unfortunately, they once again got glitchy after a few miles down the road. Now, I am unable to recreate the fix.
Also, the headlights come on without the switch (not DRL), and there is a loss of power from the motor. When the IP worked for that brief period, these two issues were also corrected.