AC Delco Batterys
CF Community Team
Joined: Oct 2004
Posts: 19,366
Likes: 5,244
From: Cape Cod, Mass.
2025 C6 of the Year Finalist - Unmodified
2025 C8 Z06/7/E-Ray of the Year Finalist - Unmodified
2023 C3 of the Year Finalist - Unmodified
2021 C8 of the Year Finalist Unmodified
2020 Corvette of the Year Finalist (performance mods)
2019 C1 of Year Winner (performance mods)
2017 Corvette of the Year Finalist
2016 C2 of Year
2015 C3 of Year Finalist
AC/Delco 7 year Professional Series battery in my 02 coupe, 68 big block and my p/u truck. Excellent battery. Don't know if they offer a gel style battery.
Race Director
Joined: Jul 2008
Posts: 17,767
Likes: 3,695
From: The Sunshine State
2022 C5 of the Year Finalist - Modified
2021 C5 of the Year Finalist - Modified
C7 of the Year - Modified Finalist 2021
Finalist 2020 C7 of the Year -- Modified
2020 C5 of the Year Finalist - Modified
C5 of Year Finalist (appearance mods) 2019
2018 C5 of Year Finalist
As to gel style, the dealer showed me 4 different batteries and none of them were identified as gel style.
Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
AC Delco stopped selling AGM batteries in 2004. My guess is that cars (like Corvettes) that often sit for extended periods do not match up well with AGM-type batteries. GM installed AC Delco AGM batteries in 2001-2003 C5s and those of us who drive their cars often and for long enough distances benefitted from 7+ years of battery life. Unfortunately, those who left their cars inactive, found that AGM batteries die very quickly under those circumstances.
Non-AGM batteries seem to be able to take periods of inactivity without suffering fatal damage and the 2005+ AC Delco Professional batteries are exceptionally durable. I have the 7YR model and expect at least 7 years of life out of it. The unique thing about it is that it comes with a 50 month free-replacement warranty - best in the business.
Now for those of you on a limited budget, the Costco Kirkland battery (about $60) represents a great value.
Non-AGM batteries seem to be able to take periods of inactivity without suffering fatal damage and the 2005+ AC Delco Professional batteries are exceptionally durable. I have the 7YR model and expect at least 7 years of life out of it. The unique thing about it is that it comes with a 50 month free-replacement warranty - best in the business.
Now for those of you on a limited budget, the Costco Kirkland battery (about $60) represents a great value.
Last edited by Dave68; Jun 15, 2010 at 09:54 PM.
Instructor
Joined: Jan 2009
Posts: 154
Likes: 1
From: Huntley Illinois
Instructor
Joined: Apr 2008
Posts: 239
Likes: 2
From: Georgetown TX
I've got the professional platinum 7-YR battery; came with 50 month replacement and prorated after that. Paid about $120 IIRC a few months back. It cured all my intermittent issues with memory seats, etc. 
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
AC-Delco Professional 78-6YR/7YR Series (must have 120 reserve capacity) replaces the first generation and AGM battery in the C5. Nice thing it runs around $106 and comes with a 30/50 month free replacement. 04's get a different battery.
Last edited by Jet-Jock; Aug 14, 2010 at 10:38 AM.
Instructor
Joined: May 2010
Posts: 117
Likes: 2
From: Providence RI
I replaced mine with ACDelco Part Number: 78-6YR. This is a 6 year battery with 700 cca and costs lest than Part Number: ACD78-60 which is a 5 year battery with only 670 cca. Sometimes just can't figure GM's pricing out? 
