Driving at highway speeds, car engine died immediately after sputtering and losing power. First time this happened, I pulled off the road and restarted the car almost immediately. Drove another 600 miles without incident. Second time, car died again at highway speeds. Restarted after 15 minutes. After reporting the problem to on-star and having remote diagnostics run, I drove another 25 miles towards dealership rather than waiting for tow. (118 deg heat in desert sun). Engine failed again about 200 yds from dealership. Dealer replaced fuel pump, pressure regulator, and filter. Cropper auto group in casa grande, AZ, kept the defective parts. I have had problems before with fuel level sensor indicating properly on this vehicle. This repair also replaced fuel level sending unit. $800+ repair. 60,000 miles on the car. Extremely hazardous loss of power and control when engine dies without warning at highway speeds. Noticed at least 5 identical complaints on NHTSA website: Oid id numbers 10041486, 10079660, 10099685, 10100051, 10126511.

- Mountain Home, AR, USA

(1) the engine stopped while on interstate in construction zone on slight hill, it would not restart. (2) the construction zone on interstate 10 was approximately 3 mile long with very narrow lanes and concrete construction barriers on each side & no shoulders. Bumper to bumper traffic and no way to clear the lane or get tow vehicle. (3) a good samaritan towed our vehicle about 2 miles to first point clear traffic. Chevy dealer confirmed fuel pump in tank had failed & replaced pump. This was second pump failure. The pump previously failed and was replaced on 30 Aug 03. Previous failure dealer said keep fuel above 25% & engine would run. The tank was at 44% when engine quit. Fuel tank was topped off before pump tested, engine would run but no pump pressure. Someone will be killed if more failures occur in heavy traffic areas. The emergency good samaritan tow out of the construction area prevented a serious accident as it was getting dark.

- Lake Charles, LA, USA