My 05 impala turns off while driving...It will start back up but i have to give it gas...Ive change the fuel filter...Fuel pressure is seemingly good...Rides on the highway no problem...It stalls out at lights and on turns. The gas gauge goes up and down during the trip...PLZ HELP...Im a student and parent...I need my car...

Intermittently failing fuel pump or intermittently failing ignition switch are two common issues on GM vehicles that cause problems that reflect what you are experiencing.

So how what would be the best way to determine which one it is...

i would put the fuel pressure gauge somewhere you can see it when it cuts out. whats the exact pressure? which engine?

Whats the part that ramps up RPM automatically when making a turn, but the engine is at a low speed. Like in parking lots, U-turns, etc? I know this is supposed to happen to make sure that the power steering pump doesn't rob too much engine power and cause a stall. Could this be the problem, that item not functioning correctly therefore RPM isn't being ramped up like it should?

IAC ? Idle air control , have you checked your air filter ? maybe your cat is clogged. Unscew one of your OX sensors and see if it goes away.

Did you fix this??? I'm having the same problem