Does the altenater need the red wire that connects to it. also the car starts to stall after driving about ten minnuts ,espesauly in traffic .could it all be linked .I just had to replace alt and brand new battery.than.k you

There are three wires that go into the alternator. YES, the computer needs all the wires for the charging system to operate properly. Make sure there is no damaged or missing wires to the alternator.

In the 3.8 Liter V 6 engine check the following to make sure none or all need replacement. In number by priority.

1*Clean and replace battery terminals if needed

2* Replace Mass Air Flow Sensor (MAF) if bad - this can be a real problem if the car has over 100.000 miles on it. A Bad mass air flow sensor can cause hundreds in car repairs, because the computer doesn't run right with a bad MAF sensor. Unplug the sensor, if the car runs better, it's indication the sensor needs replacement. Mounted on top of the intake manifold.

3.*Check and replace your air filter if it's dirty, and use a can of intake air cleaner every 12.000 miles. Air filters should typically be changed at every other oil change.

4*. Check that the Idle control intake valve is operating properly, replace if the motor is non functional. Mounted in the intake manifold.

5*.Check your fuel filter, if dirty replace and use a bottle of fuel injector cleaner after topping off at the gas station.

6*. If all else fails, have your ECM (computer) tested by a mechanic, to make sure it is working properly.

Again the Mass Air Flow sensor can be a big troublemaker in the 3.8 liter V6 GM engines when it gets hot, runs rough and dies, especially if the car has seen a few thousand miles.

Yes, the red wire should bolt to the back of the alternator. There should also should be a plug to plug into the alternator.

YES THE RED WIRE IS THE OUPUT TO THE BATTERY FROM CHARGING