98 buick regal gs 3800 stalls when turn signals are used

Sounds like you may have possibly TWO problems here. The ignition key not turning past the run position or even to the run position is most likely a lock cylinder issue and may be fixed by replacing the ignition lock cylinder, As for the power being killed when turning the ignition to the start position, that sounds like a defective ignition switch. these items are two seperate parts. The reason for the turn signal issue may be related to the ignition switch fault.
Hope this helps.

You need to take it to a qualified repair shop that has a factory or professional type scan tool an have all the computers on the vehicle checked . Check for DTC'S - diagnostic trouble codes ,module data etc.

yep i had the same problem with my 99 gs i changed the ignition wireing harness and the ignition switch sloved the problem right away

Same problem on my 98 Regal GS; remove glove box, locate the blend door actuator, (black odd shaped box with metal "ring"). Remove the box and manually turn the blend door shaft it was attached to. If you get cold air, it's the actuator you removed. About 30-40 dollars.

I had the same problem with my 98 regal. I replaced a wiring harness on the steering column that has heavy gadge wires coming from the fire wall and going to a small black box directly below the ignition switch.Since I replaced it I have not had any problems

the batt is suspect...take it to autozone, or other place, they'll check it out free......the shifting out of park is a seperate issue, the pawl for the steering/shifter is not working properly....did you notice if the steering wheel would turn when the shifter is stuck?....probably not....when this happens try to turn the wheel back and forth-not hard but not gently- a little graphite dust sprayed in there would help.......hope this helps you out

It dosent need a new steering column. But It very well may need an ingnition position sensor. It is a sensor that identifies what position the key is in. Obviously if it was malfunctioning it would not recognize you have the key in the start position, and when it does it suddenly fires. I had a 95 Regal that had the same problem, not a cheap one but pretty necessary.

I have a 99 Buick Regal and it too dies out, but only when I use my turn signals. Sometimes, when trying to start the car...the dash lights would flicker and you can hear some sort of electrical ticking sound. As of today, my car will not start (5/24/09) it hadn't turned over since yesterday. After a process of elimination and searching the net, I think I need a new ignition switch. You may need one as well.

if serpentine, then it should be on the fan shroud or the radiator cover...

Maybe a solution.  Are you sure that its because your using your turn signal?  Does this occur while moving or while sitting idle?

My car engine would turn off while sitting idle at a traffic light.  Many people turn their signals on while idle instead of before they get to the light or stop sign.  There is a problem with the engine getting too hot while stopped and then turning off.  Make sure you're put your signal on before stopping and see if that makes a difference.  If it keeps turning off while just sitting it may be the engine.  

However this might be something different and if so that very weird.