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Sounds like an alternator/battery issue. When it does start, if your voltage gauge isn't close to the 14v mark or the upper end of the gauge, then your alternator isn't charging. If your alernator is charging then your battery might have a dead cell and won't take a charge from the battery. In this case the best thing to do is take the battery to your local part store and have them charge it and test it. Most of the chain stores do it for free.
What error message are you receiving? If you are talking about your check engine light (CEL) then you will need to clear the codes for it to go away, or it must be driven through a series of specific events for the computer to clear itself, just take it down to your local auto store and have them scan and clear codes. At 14.5v you should not get the battery light, you may want to check your wiring to your ECM. With your old alternator running at 16v I would say it is possible something was damaged. I know many manufacturers do not protect the computer from spikes from alternators, I have seen this twice in the field, and actually had personal experience as well. This will require much more knowledge about your vehicle and electricity to understand what pins to test and what you should be looking for.
Hello...A red battery light or image usually means there is a problem with your charging system..either your alterator is either not operating or emitting low voltage usually because of diode failure...alternators generate Alternator Current(AC) which is the same of household current...but the vehicle can not use this...It doesn't even register...The alternator has diodes which convert AC current to DC(Direct Current) which the vehicle can use....If the alternator is not doing it's job...The vehicle will pull current from the battery while the vehicle is operating..which is not good.The alternator should be able to run the vehicle...all the accessories...and charge the battery all at the same time...Drive it into an auto parts store and have them test your charging system before you get stranded...and most of the time...the car will die at night because of the headlights.....Let me know what happens...I hope this was helpful.....PEACE.....
Hello! The problem you are experiencing is most likely due to a fautly or malfunctioning alternator. You can take the car to any major auto parts store, and they can do a FREE charging system test which will tell you if your alternator is operating (and charging the battery) properly, as well as if your battery is accepting the incoming charge from the alternator.
your idle air controller valve on the throttle body may be no good.if the idle speed drops too low,the alternator will have no output,and the steering rack which on the uplander i believe is electric like the cobalt,will not put out enough drive.if you shut off the vehicle,but leave the ignition on,and it has an electric rack,the steering should still work.if it doesnt it is hydraulic assist.if the idle speed goes to say 400 rpm,the power steering will not work .when this happens,check the tachometer what the rpm is...
Check all your fuses if you had a system failure it could have blown a fuse. I am not sure on your vehicle where the fuse is in the car or under the hood it could also have a relay. You can check your alternator by checking the voltage at the back of the alternator where the big wire bolts on. You should have 14+ volts at the alternator.