The fuel pump may fail causing engine to stall and not restart.
Car Problem Reports
Pontiac Grand Am Failed Fuel Pump Can Cause Engine to Stall
Pontiac Grand Am Problem
Engines Affected: 2.4L 4 Cylinder, 3.4L V6
Average Mileage: 140,500 mi (135,000 mi - 146,000 mi)
car was hard to start when hot. found temperature sensor faulty and not sending proper temperature to computer. replaced temperature sensor. i also found out that this could be a fuel pump or fuel check valve issue and there is a software update that can reprogram your computer for this problem. also i find what helps if you turn the switch to on and wait 3 seconds (listen for fuel pump to run its cycle to pump pressure up) then start seems to help.
Visitor, 2001 Pontiac Grand Am, 2.4L 4 Cylinder, 135,000 mi
Car cranks but will not turnover