NHTSA Complaint #10066527 — 2000 GMC DENALI

I'VE EXPERIENCED A VERY SERIOUS/DANGEROUS PROBLEM ON 9/5/03, 11/1/03, 11/2/03 & 4/18/04: THE ENGINE HAS COMPLETELY SHUT DOWN WHILE I WAS DRIVING MY SUV. THIS HAS HAPPENED WHILE I'VE BEEN DRIVING ON HWY, ON BRIDGES/ TUNNELS (WITHH NO SHOULDERS), & WHEN I'VE STOPPED THE SUV @ TRAFFIC LIGHTS & STOP SIGNS. THE COMMON DENOMINATORS FOR THE ENGINE SHUTTING DOWN SEEM TO BE: (1)LONG DISTANCE TRAVEL-ON ALL 4 OCCASIONS I HAD BEEN DRIVING THE VEHICLE ON THE HWY FOR 100 OR MORE MILES @ SPEEDS OF 60-70 MPH BEFORE THE ENGINE WOULD BEGIN SHUTTING DOWN (2)WEATHER- ON ALL 4 OCCASIONS, THE TEMPERATURE WAS 75-85 DEGREES WHEN THE ENGINE WOULD BEGIN SHUTTING DOWN WHAT TYPICALLY HAPPENS WHEN THE ENGINE SHUTS DOWN: WHILE ACTIVELY DEPRESSING THE ACCELERATOR PEDAL, I WOULD SUDDENLY NOTICE THAT I WAS NO LONGER GETTING ANY ACCELERATION POWER I WOULD THEN BEGIN TO PUMP THE ACCELERATOR PEDAL TO NO AVAIL ALL THE LIGHTS ON THE DASHBOARD ILLUMINATED, SIGNALING THE ENGINE SHUT DOWN WHEN POSSIBLE, I WOULD PULL OVER TO THE SHOULDER, & CRANK THE IGNITION 1-3 TIMES BEFORE THE ENGINE WOULD START AGAIN. ON THE DAYS THAT I EXPERIENCED THE PROBLEM, THE ENGINE WOULD CONTIN. TO SHUT DOWN EVERY 1-5 MILES, (MORE FREQUENTLY IN TRAFFIC). THE ENGINE WOULD CONTIN. TO SHUT DOWN UNTIL I COULD REACH A SAFE DESTINATION & ALLOW THE SUV TO REST FOR SEVERAL HRS. IN TOTAL, THE ENGINE SHUT DOWN 10-18 TIMES ON EACH OF THE 4 DAYS THAT I HAD THE PROBLEM. THE ENGINE WOULD SHUT DOWN MOSTLY WHILE I WAS ACTIVELY ACCELERATING, BUT ALSO HAPPENED FREQUENTLY WHEN I WOULD BRAKE WHILE IN TRAFFIC, & WHEN I WAS STOPPED @ A TRAFFIC LIGHT/STOP SIGN; OCCASIONALLY, THERE WERE TIMES WHEN I LOST ALL ACCELERATION POWER WHILE ACTIVELY DRIVING THE VEHICLE, BUT THE ENGINE DIDN'T ACTUALLY SHUTDOWN. AFTER 10-20 SEC. OF HAVING NO ACCELERATION POWER, I COULD SUDDENLY ACCELERATE AGAIN. WHEN THE ENGINE SHUT DOWN, THERE WERE NO SIGNS OF OVERHEATING & I HAD AT LEAST 1/3 TANK OF GAS.