The ninth generation of Chevrolet Impala debuted for the 2006 model year. This generation of Impala was offered as a front wheel drive four door sedan, and was powered by a wide range of V6 engines. Production continued for fleet versions until 2016 under the name "Impala Limited".
I replace the alternator and the battery on my 2008 Chevrolet Impala LT 3.5 after that now my battery light comes on after driving it shortly since with nothing on I can't have the radio on I can't have the lights on or anything so otherwise my battery is not charging and I don't know why I've got my alternator checked and my battery checked they said they're both good the battery charging sensor I replaced can someone please help me.
@pamelaeleam this sounds so much like an alternator issue. Do this. Get a voltmeter and with your car off check the voltage on your battery. You know, Voltmeter to DC V at a range of about 30V or thereablet (depends on your meter). Then black probe to negative post and red probe to positive post. Let us know what you get. A good battery has usually up to 12.6V and a reading below 12V is usually a sign of a bad battery. WE know your battery is new but discharging, so your voltage may be lower, which for now is okay.
Now, do the same thing but start your car. Your voltmeter should now show 13.6V to 14.4V. If it does not, your battery is not being charged.
Check the wiring on the battery post and the battery clamps. Make sure they are not corroded. Check the wires coming from the alternator to make sure they are properly tightened and not corroded. OF course, do that while your car is turned off.
Let me see if we can find a wiring diagram to see if there is anything in between that may have failed and thus does not allow your battery to charge. If you find anything that looks odd or doubtful, it is okay to take some pictures of it and post those on here with your question. Adding images to an existing question
There are two fuses that are of interest. One is a fusible link between your alternator, starter and then the battery; one is the fuse for the BCM. That is the fuse in the fuse box which is "mounted to the right strut tower". Check those for continuity.
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