1993 Chevrolet Suburban

MY SUBURBAN HAS DEVELOPED A PECULIAR PROBLEM THAT HAS LEFT EVEN THE DEALERSHIPS COMPLETELY CLUELESS!!! THE ENGINE HEATS UP TO ABOUT 180 F (STILL LESS THAN THE MID POINT ON THE GUAGE) AFTER A COUPLE OF HOURS OF DRIVING -- THIS IS QUITE NORMAL. IF WE STOP AND TURN THE ENGINE OFF, THE VEHICLE WILL NOT START! WE HAVE TO WAIT A COUPLE OF HOURS WHILE THE ENGINE COOLS OFF TO ABOUT 160 F, AND IT STARTS UP JUST FINE. WE ONLY NOTICED THIS SINCE WE WERE ON A LONG CROSS COUNTRY DRIVE. THE PROBLEM IS ENTIRELY PREDICTABLE, AND WE HAD TO PLAN ON TWO HOUR STOPS DURING OUR TRIP. WE EVEN DROVE STRAIGHT TO A DEALERSHIP IN RALEIGH AFTER STRAIGHT 6 HOUR DRIVES SO THAT THEY COULD SEE AND DIAGNOSE THE PROBLEM -- BUT THEY WERE COMPLETELY STUMPED. I WOULD LIKE CHEVROLET TO HELP DIAGNOSE AND FIX THIS PROBLEM. THE ABS MODULE FAILED WITHOUT ANY PRIOR WARNING. ONE MOMENT THE BREAKS WERE FINE, THE NEXT WE WERE FLOORING THE BREAK PEDAL AND THE ABS LIGHT WAS ON. THE MECHANICS HAD TO GO THROUGH SEVERAL ATTEMPTS AT REPLACING THE UNIT ($1200 FOR THE UNIT ITSELF). THIS PROBLEM SOUNDS EXACTLY LIKE THE ISSUE INVESTIGATED IN 1992-1995 SUBURBANS. I AM SURPRISED THAT THE RECALL WAS LIMITED TO THE LIGHTER SUVS ONLY -- A DECISION BASED ON COST (MOST PROBABLY). IT STANDS TO REASON THAT THE PROBLEM WOULD BE MORE CRITICAL IN HEAVIER VEHICLES.