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Discussion Starter #1
I have had my 2014 Enclave to the dealer and they say normal. Drove it yesterday 126 mi and today after a 15 mi drive when I stopped and sat for 2 minutes with the radio on. I am sick of the Low battery voltage message went on again. Bunch of crap my 2011 Enclave never did this. Dealer says they wont do anything but wait until it quits and leaves me stranded. I buy Premium vehicles from GM to get this.
 

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Are you listening to the radio with the engine off when this happens? Go to Batteries Plus and have the battery tested.
 

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Discussion Starter #3
Dealer has done a test took 1/2 day and battery came back good. Same size batter CCA in my 2011 and never had the problem. I suspect a calibration issue with the BCM. Yes the radio on and key in ACC when I comes on even when coming off a trip of 100 miles the message comes on in 5 minutes.
 

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2015 Buick Enclave
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I have a 2015 that does the same thing in the winter (engine off / listening to the radio) .. seems the lower the outside/battery temperature the earlier it comes on. Since it never left me stranded, I never looked into it. I put in a better AGM battery 2.5 years ago and it didn't make much of a difference. Dealership said the older battery tested fine too. I'll pull out the mats and do some testing with the multimeter.
 

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2015 Buick Enclave
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OK - finished the tests .. The temperature is 0C (32F) and the Enclave had been sitting outdoors for 2 days. Without putting in the key in the ignition, measured the voltage at the remote terminals and the battery as 12.2V. With the key in the ignition and the radio on (one click up). The voltage dropped to 11.9 V and the "Start Vehicle" message went on (within 2 minutes). I left the radio on for about 5 minutes and the voltage didn't drop below 11.9V. I started the car and the charging voltage was 15.1V for about 2 minutes. After ignition off it was in the 12.3V range and dropped slowly .. I turned the lights / radio on and it dropped to 11.8V and the "Start Vehicle" message came back on after 1 minute. I did this test about 5 additional times. I didn't let the car run for more than 2-3 minutes between powering off. Each time the battery voltage dropped below 12V, there was about a minute delay and the message appeared to start the vehicle.

Just for reference I measured the AMP draw from the battery and it was about 1 AMP with the interior lights on No Key. 1.7 AMPS with the key in and radio on. 10 AMPS car running.

A light load on the cold battery measured 12.2 volts. Radio / Lights caused the battery Voltage to quickly drop to 11.9 which was enough to cause the message to appear. The key point was even with the radio running for 5-10 minute period it didn't drop more than 0.1 V from 11.9V , so it appears that the threshold is just slightly above what the battery is putting out (when cold). I tested the battery voltage disconnected from the car and it was 12.7V. I also used an Ancel BA301 battery tester and it reported the battery as good when disconnected from the car.

I don't know if there is a solution, but it doesn't look like the "Start Vehicle" message is a good indicator of battery capacity or health. It looks like the draw on the (cold) battery is enough to drop the voltage to below the threshold where the message appears.

Hope this helps.
 
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