One problem related to wiper has been reported for the 2000 GMC Jimmy. The most recently reported issues are listed below.
I was driving at night and my headlights (which are automatic type using a light sensor) went out for a few seconds without me doing anything. After a few seconds they came back on. They did it a 2nd time for a shorter time period on the same drive and have flashed off for a few seconds temporarily on a few nights since then. The interior dash/switch lighting inside the car does not go out, just the headlamps.