2003 Corvette battery.......
Thread Starter
Racer
Joined: Feb 2002
Posts: 288
Likes: 27
From: Loveland CO
2003 Corvette battery.......
The 13 year old battery in my 2003 coupe finally died this week. I wanted to get another AGM battery because that is what my car originally came with because of the computer stuff under the battery tray. But I found out that it is near impossible to find an AGM battery now.
I checked with 2 local Chevy dealers and they could not even get an AC Delco AGM battery. They also said that my car now takes a group 78 battery, instead of the group 75 that my car came with.
So I started checking with all the local parts stores; Auto Zone, Advanced Auto, NAPA, O'Reilly, etc. Nobody could get an AGM battery; no Die Hard, Duralast. Optima.
I finally found an O'Reilly store that had a group 78 SuperStart Platinum AGM battery. The length of the battery was about 1" longer that my group 75 battery, but the other dimensions were the same, so I measured my battery tray and it would just barely fit. I bought it for $229 and installed it. It was a tight fit, but it worked.
I'm guessing that there must be some kind of supply chain problem with AGM batteries right now?
I checked with 2 local Chevy dealers and they could not even get an AC Delco AGM battery. They also said that my car now takes a group 78 battery, instead of the group 75 that my car came with.
So I started checking with all the local parts stores; Auto Zone, Advanced Auto, NAPA, O'Reilly, etc. Nobody could get an AGM battery; no Die Hard, Duralast. Optima.
I finally found an O'Reilly store that had a group 78 SuperStart Platinum AGM battery. The length of the battery was about 1" longer that my group 75 battery, but the other dimensions were the same, so I measured my battery tray and it would just barely fit. I bought it for $229 and installed it. It was a tight fit, but it worked.
I'm guessing that there must be some kind of supply chain problem with AGM batteries right now?
Race Director
Joined: Aug 1999
Posts: 11,126
Likes: 673
From: SE Pennsylvania
St. Jude Donor '03 thru '26
Oldtimer
I bought my car in september and I ordered a Optima Red-Top 75/25 like I had in my last C5 and because of the ECM sitting under the battery itself, and I bought from Optima the company and they sell on Amazon, which is great because they handle the shipping. Amazon is good place to buy a lot of automotive parts, I put 4 new General Max-RS tires on my car as well last October and they too, were bought from General and again on Amazon. I love not having to pay shipping ! 
Burning Brakes
Joined: Jun 2022
Posts: 758
Likes: 366
The 13 year old battery in my 2003 coupe finally died this week. I wanted to get another AGM battery because that is what my car originally came with because of the computer stuff under the battery tray. But I found out that it is near impossible to find an AGM battery now.
I checked with 2 local Chevy dealers and they could not even get an AC Delco AGM battery. They also said that my car now takes a group 78 battery, instead of the group 75 that my car came with.
So I started checking with all the local parts stores; Auto Zone, Advanced Auto, NAPA, O'Reilly, etc. Nobody could get an AGM battery; no Die Hard, Duralast. Optima.
I finally found an O'Reilly store that had a group 78 SuperStart Platinum AGM battery. The length of the battery was about 1" longer that my group 75 battery, but the other dimensions were the same, so I measured my battery tray and it would just barely fit. I bought it for $229 and installed it. It was a tight fit, but it worked.
I'm guessing that there must be some kind of supply chain problem with AGM batteries right now?
I checked with 2 local Chevy dealers and they could not even get an AC Delco AGM battery. They also said that my car now takes a group 78 battery, instead of the group 75 that my car came with.
So I started checking with all the local parts stores; Auto Zone, Advanced Auto, NAPA, O'Reilly, etc. Nobody could get an AGM battery; no Die Hard, Duralast. Optima.
I finally found an O'Reilly store that had a group 78 SuperStart Platinum AGM battery. The length of the battery was about 1" longer that my group 75 battery, but the other dimensions were the same, so I measured my battery tray and it would just barely fit. I bought it for $229 and installed it. It was a tight fit, but it worked.
I'm guessing that there must be some kind of supply chain problem with AGM batteries right now?
It would probably help to let everyone know what area you live in.
Amazon has both 75 &78 in stock on the optima’s
They also have a Odyssey in stock
Edit I see you found something.
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Racer
Joined: Mar 2021
Posts: 255
Likes: 72
From: Maryland
The O'Reilly's AGM/Super Start battery is pretty good. I had them in all 3 of my cars when I was living in Dallas which the heat is really tough on batteries out there. I live in MD so no O'Reillys stores out here. I ended up with a Optima Red top but if I were to do it again, I'd probably order an Odyssey online.
Administrator
Joined: Mar 2001
Posts: 368,779
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From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
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St. Jude Donor '03 thru '26
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Glad you were able to find a replacement AGM battery. Seems like things are in short supply no matter what you are looking for.
6th Gear
Joined: Jan 2022
Posts: 6
Likes: 0
From: Huntley, IL
Hello Racer, Do you still have your original 75 battery? If yes, please email me a picture and selling price. Thank you, caak66@yahoo.com
Burning Brakes
Joined: Jun 2007
Posts: 773
Likes: 214
From: Auburn Ohio
Currently running a 7 Year Old Interstate
Conventional Flooded Battery
It sat unattended outside in a shed in Northeast Ohio for Six Years
dug it up when I need a new battery for my recently acquired C5
Flipped it on a 2 AMP charger ....it was done in half an hour ....installed it and it has been 100% successful for the past year
.... I do not run my 2001 on a charger or maintainer
The car gets occasional use ...maybe 2000 miles since I bought it last November
....Seriously had similar success with other Interstate batteries in tractors and other equipment
can’t say enough about Interstate. !!!
..... and I installed a silicone pad that seals off the stupid stanchion hole in the battery tray
Conventional Flooded Battery
It sat unattended outside in a shed in Northeast Ohio for Six Years
dug it up when I need a new battery for my recently acquired C5
Flipped it on a 2 AMP charger ....it was done in half an hour ....installed it and it has been 100% successful for the past year
.... I do not run my 2001 on a charger or maintainer
The car gets occasional use ...maybe 2000 miles since I bought it last November
....Seriously had similar success with other Interstate batteries in tractors and other equipment
can’t say enough about Interstate. !!!
..... and I installed a silicone pad that seals off the stupid stanchion hole in the battery tray
Race Director
Joined: May 2004
Posts: 15,866
Likes: 196
From: PA
Best AGM battery money can buy, this is what I have in my z and truck.
https://www.odysseybattery.com
https://www.odysseybattery.com