One problem related to dash wiring has been reported for the 2002 Chevrolet S10. The most recently reported issues are listed below.
A/c fan either stops functioning or slows to low after extended periods (usually 20-25 minutes) running fan on high at max cool during periods of hot (75-80 degrees) weather. Turning fan and a/c off for a few minutes temporarily resolves problem. Dealer unable to diagnose unless they have vehicle in failure mode, which is usually impossible to accomplish. It acts almost as though the a/c system had an overload switch on it that temporarily shuts unit down. L.