That's all that was required when mine was changed.
Battery Change Question
Thread Starter
Drifting
Joined: Dec 2013
Posts: 1,519
Likes: 212
From: FL
Battery Change Question
Seen a post about a memory saver 9 Volt and a plug to the rear tender plug.
The time is coming to replace the battery in my 2019 and two questions:
1. Does the memory saver work?
2: Can you use a battery tender instead?
The time is coming to replace the battery in my 2019 and two questions:
1. Does the memory saver work?
2: Can you use a battery tender instead?
Last edited by Richard Ames; Feb 5, 2026 at 12:17 PM.
Popular Reply
Feb 5, 2026, 12:03 PM
Safety Car
Joined: Dec 2012
Posts: 3,859
Likes: 1,865
From: St. Louis Metro East IL
You don't need a memory saver. Depending on how long it takes you to replace the battery you will need to index windows and possibly reset seat & mirror memory. It is a good time to review all settings in the infotainment system anyway.
BEFORE YOU START WITH THE BATTERY: test that the emergency key works to open the hatch / trunk and test the door manual releases. Leave at least one window open so you can reach a door release to get into the car.
Also a good time to replace the fob batteries.
A battery tender probably should not be plugged into the car without a battery present. I guess any 9 - 12 vdc battery connected into the rear accessory plug would maintain memory, but not worth the effort. If you do connect, be sure of the polarity.
Have Fun!
Ron
BEFORE YOU START WITH THE BATTERY: test that the emergency key works to open the hatch / trunk and test the door manual releases. Leave at least one window open so you can reach a door release to get into the car.
Also a good time to replace the fob batteries.
A battery tender probably should not be plugged into the car without a battery present. I guess any 9 - 12 vdc battery connected into the rear accessory plug would maintain memory, but not worth the effort. If you do connect, be sure of the polarity.
Have Fun!
Ron
Safety Car
Joined: Dec 2012
Posts: 3,859
Likes: 1,865
From: St. Louis Metro East IL
You don't need a memory saver. Depending on how long it takes you to replace the battery you will need to index windows and possibly reset seat & mirror memory. It is a good time to review all settings in the infotainment system anyway.
BEFORE YOU START WITH THE BATTERY: test that the emergency key works to open the hatch / trunk and test the door manual releases. Leave at least one window open so you can reach a door release to get into the car.
Also a good time to replace the fob batteries.
A battery tender probably should not be plugged into the car without a battery present. I guess any 9 - 12 vdc battery connected into the rear accessory plug would maintain memory, but not worth the effort. If you do connect, be sure of the polarity.
Have Fun!
Ron
BEFORE YOU START WITH THE BATTERY: test that the emergency key works to open the hatch / trunk and test the door manual releases. Leave at least one window open so you can reach a door release to get into the car.
Also a good time to replace the fob batteries.
A battery tender probably should not be plugged into the car without a battery present. I guess any 9 - 12 vdc battery connected into the rear accessory plug would maintain memory, but not worth the effort. If you do connect, be sure of the polarity.
Have Fun!
Ron
Melting Slicks
Joined: Jun 2019
Posts: 2,042
Likes: 928
From: near philly
I didn't do anything at all when I changed mine
I didn't even know window indexing was a thing when changing the battery, of course maybe that explains why my windows don't go all the way up???
I didn't even know window indexing was a thing when changing the battery, of course maybe that explains why my windows don't go all the way up???
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We'd like the opportunity to assist with your battery concerns and questions alongside your servicing dealership's support, Richard. To do so, may you please email us at socialmedia@gm.com with your VIN, full contact information (email address and phone number), mileage and the name/location of your servicing dealer? With that, be sure to include "Richard Ames/Forum" the subject line to best assist. We look forward to your outreach. By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement.
Advanced
Joined: Sep 2022
Posts: 94
Likes: 12
From: South Carolina, USA
If it's the OEM battery, might want to invest in a lifting strap from Amazon or something. Nearly broke my back trying to get the OEM battery out. Ended up creating a handle with zip ties and fed them under the battery.
Le Mans Master
Joined: Jun 2019
Posts: 5,487
Likes: 2,193
From: Loveland
I just did mine. I didn't use any power to the system. Just in case, put the windows down. I also had to use a strap around the battery to get it out. A real pain in the butt. I got the ADCelco 48AGM for $177 at Walmart. Also, hard to squeeze in. You need to tilt it. Only remove the two main terminal connections and the large nut on the cable. I charged mine to full before I installed it. Don't forget to use the little red vent plug, that comes with the new battery, it plugs the hole opposite the original vent and install the original vent tube. DONT break the little black wires hooked to the negative terminal cable. DON'T tear the carpet.
Re-index the windows, set the clock, and you're done
Re-index the windows, set the clock, and you're done
Last edited by kodpkd; Feb 15, 2026 at 05:39 PM.
Melting Slicks
Joined: Aug 2016
Posts: 2,762
Likes: 1,017
From: MOUNTAIN HOME Arkansas
Question? Will the 9 volt memory saver hold all the SMOG check info that is normally lost when battery is disconnected? All that info that has to be reset by doing multiple drive cycles. 🤔