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Problems with Chevy Impalas
I'm seeking help/advice for an electrical problem with my 2010 Chevy Impala. I bought the car used last June (2017) and this problem started happening after several months of ownership.
The blower fan motor in the car will come on at high speed without the keys in the ignition. This has happened more than several times and usually after the car's been driven for a short period of time. The lights on the dash also come on. The way that I've been able to shut it off is by putting the key into the ignition and turning it to the on position and back off. It will continue to run, as far as I know, until I turn it off. It has ran down the battery to a point that I wasn't able to charge the battery back and had to replace it.
I've taken it to 3 places, all reputable, including a Chevy dealership, but they can't reproduce it and can't fix it without the problem happening. I have it in to a fourth place now and hope they can find the problem.
I know there is a problem with GM cars doing this and is not only inclusive for the Impala. I've read on many Chevy forums that the usual suspect is the inline resistor to the blower fan motor. I've replaced this twice with AC Delco parts, but to no avail. All three places I've taken it in to have checked the resistor, motor, etc. and find no issues.
Any help on this would be greatly appreciated.
Thanks!
The blower fan motor in the car will come on at high speed without the keys in the ignition. This has happened more than several times and usually after the car's been driven for a short period of time. The lights on the dash also come on. The way that I've been able to shut it off is by putting the key into the ignition and turning it to the on position and back off. It will continue to run, as far as I know, until I turn it off. It has ran down the battery to a point that I wasn't able to charge the battery back and had to replace it.
I've taken it to 3 places, all reputable, including a Chevy dealership, but they can't reproduce it and can't fix it without the problem happening. I have it in to a fourth place now and hope they can find the problem.
I know there is a problem with GM cars doing this and is not only inclusive for the Impala. I've read on many Chevy forums that the usual suspect is the inline resistor to the blower fan motor. I've replaced this twice with AC Delco parts, but to no avail. All three places I've taken it in to have checked the resistor, motor, etc. and find no issues.
Any help on this would be greatly appreciated.
Thanks!
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Comments
Now I just dropped it off with another mechanic tonight and was explaining to him the problem. When he heard that the ignition/dash lights come on too, he pointed to the ifnition switch. So, I hope he’s on to something. I’ll post later if he made the right call.
Thanks again for your reply.
The body control modules have to be programmed to the car, which means a dealer or a shop with a TechII and GM access online to program. I may be _wrong_ on what's required. I've just read about how things are done as others have solved problems.
2014 Malibu 2LT, 2015 Cruze 2LT,
I see that in the first of the 3 blocks, there is an HVAC module and that module links to the blower motor module...
In the HVAC module there is a section that involved the lights and I believe that is the display light. I do not know where that module is located. Your mechanic, if he's up on his tech stuff should have a reference telling him where and how it can be replaced with a like part number or a replacement updated part number.
His tech info should tell him if that needs programming by a dealer or Tech II GM access.
2014 Malibu 2LT, 2015 Cruze 2LT,
Wow! Thank you so much for providing this information, even if it’s not the solution! I will show this to my mechanic on Monday when I drop it back off to him. I understand electrical problems can be like opening up a can of worms, but would like to think that this problem has been seen before and GM would know what to look for. I’m really frustrated with this and every where I go, I’m dropping money but not getting the problem fixed.
Thanks again, for taking time to reply and perhaps finding the solution!
Have a nice day!