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Changing Battery #5327046 01/19/20 12:16 PM
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Char Baby Online Content OP
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When changing the battery in my SILs 2014 GMC Terrain 2.4L 4cyl, this vehicle DID NOT LOOSE any dashboard(computer) information. And, I had the battery out of the vehicle for quite some time while I removed it, brought it to AAP and came home with a new battery. At least 1 hour.

*The clock kept time.
*The trip odometers both kept thir same miles.
*The compass only went to "CAL" then reset properly.
*The radio stations ALL stayed right where they were.
*The TPMS didn't need a recalibration.

My question is, are there capacitors in TERRAIN/ EQUINOX & other GM vehicles for all of these features that allow them to keep their information?

Last edited by Char Baby; 01/19/20 12:25 PM.

Retired 6 yrs now & lovin' it
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'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic 1.8 LX
Re: Changing Battery [Re: Char Baby] #5327056 01/19/20 12:24 PM
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dogememe Online Content
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Probably not capacitors. But it's probably saved to flash storage.

Last edited by Kestas; 01/19/20 02:41 PM. Reason: no need to completely quote the first post in the second post

2010 Ford Escape 2.5 ~102K Miles: Castrol Magnatec 5W-20, Wix Filter.
2001 Chevy Suburban 5.3 ~290K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
Re: Changing Battery [Re: dogememe] #5327063 01/19/20 12:31 PM
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Donald Online Content
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I agree probably flash memory like a USB memory stick. Not sure why the auto manufacturers haven't been doing this for a long time.

Last edited by Kestas; 01/19/20 02:42 PM. Reason: no need to completely quote the first and second post in the third post

2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Changing Battery [Re: Char Baby] #5327130 01/19/20 02:22 PM
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JHZR2 Offline
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As I recall in my 98 S-10 it keeps the radio stations and clock. Trip odometer resets though...

Re: Changing Battery [Re: Char Baby] #5327261 01/19/20 05:57 PM
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FA_WRX Offline
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I would say probably a EPROM circuit.


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Re: Changing Battery [Re: Char Baby] #5327336 01/19/20 07:24 PM
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CR94 Offline
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How could the clock keep time with no power, unless it has a built-in backup battery? The other stuff (including time of day at time of battery disconnection) could be stored in non-volatile memory.


2011 Toyota Prius now at 109K
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Re: Changing Battery [Re: Char Baby] #5327375 01/19/20 08:23 PM
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Dave9 Offline
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Yes, the clock would require a supercap or traditional battery to keep time that long.

Re: Changing Battery [Re: Char Baby] #5327513 01/20/20 03:15 AM
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Char Baby Online Content OP
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Thanks all.
I was just wondering if anyone knew exactly what GM uses in their vehicles that allow the system(s) to keep their settings. As I mentioned earlier, the only feature that needed time to reset was the compass which went into "CAL Mode" and then reset on its own while driving.


Retired 6 yrs now & lovin' it
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic 1.8 LX
Re: Changing Battery [Re: Char Baby] #5327703 01/20/20 10:00 AM
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Sierra048 Offline
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Timely thread for me.

The battery in our Sierra is going. I watched a few YouTube vids because of the bus bar from the positive post on the battery. One of the vids I saw the fellow hooked up a 12v battery tender to the positive and negative cables because he didn't want to lose any of his settings. Do any on here feel this is necessary or is it just as safe to just remove the cable from the battery terminals and replace? I can't think of any settings I would worry about losing. I don't use the radio for my music.


2014 Nissan Frontier
2014 GMC Sierra 1500
Re: Changing Battery [Re: Sierra048] #5328409 01/21/20 01:47 AM
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Char Baby Online Content OP
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I think that not losing the settings is mostly for convenience but, there may be other reasons.
Any time that I've replaced any vehicle battery, I just take off the +/- terminals and don't concern myself with anything else other than getting another batter in a timely fashion.

Last edited by Char Baby; 01/21/20 01:50 AM.

Retired 6 yrs now & lovin' it
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic 1.8 LX
Re: Changing Battery [Re: Char Baby] #5329375 01/22/20 09:19 AM
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Sierra048 Offline
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Originally Posted by Char Baby
I think that not losing the settings is mostly for convenience but, there may be other reasons.
Any time that I've replaced any vehicle battery, I just take off the +/- terminals and don't concern myself with anything else other than getting another batter in a timely fashion.


Thanks. That's what I've always done. Since I haven't had to change the battery on either one of our 2014 vehicles I wasn't sure if engineers had made it more complicated. I wouldn't be surprised if they did.


2014 Nissan Frontier
2014 GMC Sierra 1500
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