2005 Grand Prix stalls driving down the road, after sitting for 10 to 15 minuets it's fine. This happens all the time. The garage where I have taken it to can't seem to figure out what is wrong with it. I've been told it could be the filter inside the gas tank, and sediment in the tank.

SOURCE: starts and stalls

I had a similar problem on my 1999 Grand Prix, 3.8l engine. I replaced the IAC Motor (Idle Air Control) that attaches into the throttle body. After disconnecting the battery, the computer goes into a learning process. It stalled once, but now seems to be running correctly. The codes set were Engine Misfire, which could be anything. I also bought a crank sensor, which is suspect, but I didn't install it.

SOURCE: 98 firebird stalls while driving down the road.

if there are no codes it could be a crank sensor. most common if it only happens after you go over 80klms per hour is the egr valve

SOURCE: pontiac grand am stalling

believe me the motor in your car has spark plugs. unless the engine is a deisel which i highly doubt...you definitely have a fuel problem, or more likely a gas guage problem.where at a 1/4 tank it actually is running on fumes... have it checked at a full service garage..good luck..

SOURCE: My 1995 Grand Prix stalls.

fuel pump yes...and it could be that the injector is dirty or faulty

SOURCE: My 1995 Grand Prix stalls.

It sounds to me like you need to replace your fuel filter. Depending on when your last complete tune up was, I would start there for sure.