1998 Chevrolet Truck M/L Van

I HAVE HAD SEVERAL ENGINE STALLS ON MY 1998 6.5 CHEVROLET DIESEL ENGINE. THE ENGINE WILL QUIT AS IF THE SWITCH IS TURNED OFF AT RANDOM TIMES AND DRIVING CONDITIONS. THE DANGER THAT THIS POSES IN HIGHWAY TRAFFIC CAN NOT BE UNDER STATED. WHEN THE ENGINE QUITS I ALSO LOOSE THE POWER STEERING AND BRAKING MAKING THIS A VERY DANGERIOUS SITUATION. ALTHOUGH I HAVE NOT HAD A CRASH WHEN THIS CONDITION OCCURS, I HAVE HAD SEVERAL CLOSE CALLS AND HAVE READ ON INTERNET WEB SITES OTHERS THAT HAVE NOT BEEN SO LUCKY. MY TRUCK IS STILL UNDER WARRANTY BUT THE DEALERSHIPS ARE UNABLE TO FIX THE PROBLEM BECAUSE (ACCORDING TO THEM) NO ERROR CODES ARE RECEIVED FROM THE COMPUTER. THE DATE LISTED BELOW IS THE MOST RESENT FAILURE OF THE ENGINE. *AK

THIS IS, AS I HAVE READ ELSEWHERE, A COMMON PROBLEM WITH ALL GM VEHICLES USING "DEXCOOL" ANTIFREEZE. MY '98 CHEVY EXPRESS VAN HAD AN INTAKE GASKET FAILURE WHICH ALLOWED COOLANT INTO THE ENGINE OIL AND CAUSED SLUDGING AND A RESTRICTION IN THE OIL PUMP AND NEAR DAMAGE TO THE UPPER ENGINE. LUCKILY, IT DID NOT CAUSE, OR AT LEAST I DON'T THINK IT CAUSED PERMANENT ENGINE DAMAGE, HOWEVER, IT COSTED $1270 TO REPAIR. THE DEALER INSISTED THERE ARE NO SERVICE BULLETINS OR RECALLS FOR THIS PROBLEM BUT, THROUGH MY OWN RESEARCH, I AM FINDING THAT THIS IS A COMMON OCCURENCE WITH VEHICLES USING DEXCOOL COOLANT. I FEEL THIS INTAKE MANIFOLD GASKET FAILURE WAS A DIRECT RESULT OF GM'S OVERSIGHT IN CONTINUING TO USE THE DEXCOOL TYPE ANTIFREEZE DESPITE MANY REPORTED PROBLEMS WITH ITS COMPATIBILITY IN COOLING SYSTEMS. *AK