Chevy Silverado Battery Size Chart by Year 1999 to 2026
The Chevy Silverado battery size chart by year begins with Group 75 and 78 on older trucks, Group 48 (H6) on many 2008–2014 models, and Group 94R (H7) or 49 (H8) on later configurations. No single battery group fits every Silverado of the same year. Engine and equipment matter.
The chart covers Silverado 1500 trucks from 1999 through 2026, with a separate HD reference. Match its group codes against your original label and a VIN-specific lookup.
TruckGuider / Technical Reference
Silverado Battery
Sizes at a Glance
Recommended Best Deal Products
1500 series | Replacement catalog reference
– 2026 Model years
01 Battery group options by era
Catalog options, not universal fitsSide-terminal and dual-terminal options appear in catalogs.
2007 Classic differs; 2008–2013 catalogs list 91 and H6.
Engine and factory equipment can change the group.
Gas, Duramax, LD/LTD, and model year affect fitment.
02 Modern battery case lengths
Approximate ACDelco product dimensionsBar lengths are to scale. Case width is about 6.8–6.9 in; height about 7.4–7.5 in for referenced products.
Verify before you buy
Fitment warning: A listed group is not a universal replacement for every truck in the range. Use a VIN-specific parts lookup. Silverado 2500HD/3500HD configurations require a separate check.
Chevy Silverado Battery Size Chart by Year
The table lists replacement-battery group options, not universal factory sizes. Alternatives found in catalogs are not automatically interchangeable.
| Model Year | Silverado 1500 Battery Group Options | Main Configuration Note |
|---|---|---|
| 2026 | 94R/H7 gas; 49/H8 diesel candidates | GM catalogs both groups for 2026; match engine and VIN |
| 2025 | 48/H6, 94R/H7, 49/H8 | Catalog lists multiple groups; match engine and build |
| 2024 | 94R/H7 gas; 49/H8 diesel candidates | Confirm exact application and battery label |
| 2023 | 94R/H7 gas; 49/H8 diesel | Engine-specific replacement listings |
| 2022 | 94R/H7 gas; 49/H8 diesel | 1500 LTD has a separate fitment listing |
| 2021 | 48/H6 or 94R/H7 | 4.3L V6 uses H6 options; 3.0L listings include H7 |
| 2020 | 48/H6, 94R/H7, or 49/H8 | V6 and some V8 listings include H6; diesel has H7/H8 options |
| 2019 | 48/H6 or 94R/H7 | 4.3L V6 and 1500 LD need separate checks |
| 2018 | 48/H6 or 94R/H7 | Engine and factory equipment determine fit |
| 2017 | 48/H6 or 94R/H7 | 5.3L and 6.2L catalog options include H7 |
| 2016 | 48/H6 or 94R/H7 | 4.3L commonly lists H6; V8 fitment varies |
| 2015 | 48/H6 or 94R/H7 | Several V8 listings include both group families |
| 2014 | 48/H6 | Replacement catalogs list H6 for 4.3L, 5.3L, and 6.2L |
| 2013 | 91 or 48/H6 | Catalog options include Group 91 and H6 |
| 2012 | 91 or 48/H6 | Select the correct engine application |
| 2011 | 91 or 48/H6 | Multiple V6 and V8 applications use these groups |
| 2010 | 91 or 48/H6 | Confirm label, tray, and hold-down |
| 2009 | 91 or 48/H6 | Group 91 and H6 replacement listings |
| 2008 | 91 or 48/H6 | Redesigned GMT900 truck applications |
| 2007 | 75/78, 78, or 48/H6 | Classic versus redesigned truck must be identified |
| 2006 | 75, 78, or 34/78 | 34/78 listed for some 6.0L configurations |
| 2005 | 75, 78, or 34/78 | Terminal arrangement varies by battery |
| 2004 | 75, 78, or 34/78 | Dual-terminal alternatives appear in catalogs |
| 2003 | 75, 78, or 34/78 | Engine-specific options for 4.3L, 4.8L, 5.3L, and 6.0L |
| 2002 | 75, 78, or 34/78 | Different groups appear among engine listings |
| 2001 | 75, 78, or 34/78 | Some 4.3L and 4.8L listings show 34/78 |
| 2000 | 75, 78, or 34/78 | Check the original terminal style |
| 1999 | 75 or 78 | 4.3L, 4.8L, and 5.3L replacement options |
How to read the table: A 2023 Silverado 1500 with the 5.3L V8 has an H7 AGM replacement listed, while its 3.0L Duramax counterpart has an H8 AGM listing. A 2020 3.0L Duramax has both H7 and H8 replacement options in one catalog, so its actual installed group deserves confirmation rather than an automatic H8 purchase.
Earlier entries draw on Firestone’s Silverado 1500 battery lookup. Chevrolet catalogs Group 94R and Group 49 batteries for Silverado 1500 applications through 2026, but does not specify one universal group for every engine. Verify 2024–2026 fitment by VIN.
Which Batteries Fit 1999 to 2006 Silverado 1500
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First-generation Silverado 1500 trucks frequently appear in replacement catalogs with Group 75 and Group 78 batteries. Certain engines and product lines also have Group 34/78 alternatives. These groups should not be treated as identical cases.
For a 1999 truck, Firestone lists Group 75 and 78 replacements across the 4.3L V6, 4.8L V8, and 5.3L V8. Its 2004 listings add Group 34/78 options for several engines. Group 34/78 batteries may offer both top-post and GM-style side-terminal connections, but terminal design varies by product.
Match the original side-post, top-post, or dual-terminal arrangement. Terminal fit matters as much as cold-cranking amps (CCA).
Which Batteries Fit 2007 to 2013 Silverado 1500
The 2007 transition makes battery lookup more complicated. The Silverado Classic continued the older design, while the redesigned Silverado moved to the GMT900 platform. The battery catalog needs to match the exact model designation, not just “2007 Silverado.”
For 2008 through 2013 Silverado 1500 models, Firestone lists Group 91 and Group 48/H6 replacements across multiple gasoline engines. Its 2013 application chart includes Group 91 batteries rated at 615 replacement CCA and Group 48 options rated at 730 or 760 replacement CCA, depending on battery construction.
These are replacement-product ratings, not universal factory minimums. Verify the vehicle’s specified battery and cables before changing groups.
Which Batteries Fit 2014 to 2018 Silverado 1500
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The 2014 Silverado 1500 commonly uses Group 48 (H6) in replacement catalogs for the 4.3L V6, 5.3L V8, and 6.2L V8. Later K2XX trucks show both H6 and H7 options, depending on engine and equipment.
For example, Firestone lists H6 replacements for all three major engines in 2014. Its 2016 application records include Group 94R/H7 alternatives for the 5.3L and 6.2L V8, while the 4.3L V6 lists H6 options. By 2018, H6 and H7 options still appear in the catalog, including alternatives for the 5.3L.
Group 94R is longer than Group 48. Verify tray clearance and clamps before selecting it.
Which Batteries Fit 2019 to 2026 Silverado 1500
Modern Silverado 1500 applications more often specify Group 94R/H7 AGM for gasoline engines and Group 49/H8 AGM for some 3.0L Duramax diesel applications. The distinction matters, but exceptions exist.
In Firestone’s 2022 and 2023 engine-specific listings, the 2.7L four-cylinder, 5.3L V8, and 6.2L V8 are paired with an H7 AGM replacement rated at 850 CCA. The 3.0L Duramax diesel is paired with an H8 AGM replacement rated at 900 CCA. Those are replacement-product ratings, not GM’s original-equipment CCA figures.
For 2019–2021 trucks, the application picture is less uniform. A 2019 or 2020 Silverado 1500 with the 4.3L V6 has Group 48/H6 listings alongside other alternatives. The 2020 3.0L Duramax shows H7 and H8 replacement options, while Firestone’s 2021 diesel listing identifies H7 options. That is why a blanket statement that every 2019-and-newer Duramax takes an H8 is unreliable.
Chevrolet’s Group 49 AGM replacement listing confirms its H8 dimensions and lists 2020–2026 Silverado 1500 compatibility, but exact engine fitment remains VIN-specific.
For 2024–2026 trucks, H7 gasoline and H8 diesel are starting points, not universal assignments. GM’s parts listings include both cases, while its OE electrical-ratings chart does not identify the group for every engine.
How 2007 Classic 2019 LD and 2022 LTD Differ
Transition years have separate carryover and redesigned applications.
The 2007 Silverado Classic is not the same application as the redesigned 2007 Silverado. The 2019 Silverado 1500 LD also uses a carryover design. For 2022, the Silverado 1500 LTD is listed separately from the refreshed Silverado 1500 in battery catalogs.
Select the exact “1500,” “1500 LD,” or “1500 LTD” designation in the VIN-based lookup when offered.
Which Batteries Fit Silverado 2500HD and 3500HD Trucks
Silverado HD battery fitment is separate from the half-ton truck chart. Engine choice, diesel starting equipment, and optional auxiliary batteries can affect the correct replacement.
| HD Application | Documented Battery Information | Fitment Check |
|---|---|---|
| Older 2500 and early HD applications | Group 75, 78, and other engine-specific replacements appear | Check exact year and engine |
| 2014 Silverado 2500HD 6.0L and 6.6L | Group 48/H6 and selected H7 replacement listings | Check gasoline versus Duramax |
| 2023 Silverado 2500HD 6.6L | Group 48/H6 and H7 replacement options in catalog | Match battery quantity and equipment |
| 2026 Silverado 2500HD/3500HD 6.6L gas | GM lists AGM, 730 OE CCA, 80 Ah for the main battery | Group size requires parts-catalog check |
| 2026 Silverado 2500HD/3500HD 6.6L Duramax | GM lists flooded, 730 OE CCA, 70 Ah per listed battery application | Verify dual-battery arrangement and both labels |
GM also lists 2026 auxiliary battery specifications for applicable HD configurations. Do not copy the 1500 battery fitment chart.
If your Duramax has two starting batteries, test both and inspect the charging system before deciding whether to replace one or both.
How Group 48 94R 49 and 78 Differ
A Battery Council International (BCI) group identifies a battery’s physical fitment class. Group 48/H6, Group 94R/H7, and Group 49/H8 are different lengths even though their width and height are similar.
| Battery Group | Approximate Case Size in Inches | Important Detail |
|---|---|---|
| 48 / H6 | 10.9 × 6.9 × 7.5 | Shorter modern case |
| 94R / H7 | 12.4 × 6.9 × 7.5 | About 1.5 inches longer than H6 |
| 49 / H8 | 13.9 × 6.9 × 7.5 | About 1.5 inches longer than H7 |
| 75, 78, 34/78 | Depends on the exact group and product | Older terminal layouts need careful matching |
| 91 | Check the actual product specification | Found in several 2008–2013 replacement catalogs |
Dimensions are approximate. Chevrolet’s Group 94R AGM specification confirms the H7 case and replacement rating.
Do not substitute a different group solely because its advertised CCA is higher. The battery must sit securely in the tray, accept the original hold-down, and let both cable ends connect without strain.
How Silverado Battery CCA and Chemistry Change by Engine
Cold-cranking amps describe starting current under a standardized cold-temperature test. Amp-hours (Ah) measure storage capacity, while reserve capacity (RC) expresses how long a battery can supply a specified test load.
GM’s 2026 original-equipment battery ratings provide a useful comparison:
| 2026 Silverado Engine | OE Battery Chemistry | OE SAE CCA | OE Ah | OE RC Minutes |
|---|---|---|---|---|
| 1500 2.7L TurboMax | AGM | 730 | 80 | 140 |
| 1500 5.3L V8 | AGM | 730 | 80 | 140 |
| 1500 6.2L V8 | AGM | 730 | 80 | 140 |
| 1500 3.0L Duramax | AGM | 850 | 95 | 160 |
| 2500HD/3500HD 6.6L gas | AGM | 730 | 80 | 140 |
| 2500HD/3500HD 6.6L Duramax | Flooded | 730 | 70 | 120 |
The 730-CCA OE gas rating and 850-CCA aftermarket H7 rating describe different batteries.
If the truck originally uses absorbent glass mat (AGM) technology, replace it with an approved AGM application unless Chevrolet’s VIN-specific service information explicitly authorizes an alternative. Older flooded-battery trucks may accept an AGM replacement with the right fit, but that decision still requires a compatible charging and mounting setup.
How to Confirm Your Silverado Battery Fitment
Before ordering, use this five-step check. It resolves most disagreements between broad year charts and actual replacement catalogs.
- Identify the exact truck. Note the model year, 1500 versus 2500HD or 3500HD, engine, and any Classic, LD, or LTD designation.
- Read the existing battery label. Record its BCI group, AGM or flooded designation, CCA, and original equipment part number if legible.
- Inspect the physical mounting. Check case length, terminal positions, tray clearance, cable reach, and hold-down design.
- Check the manufacturer application. Enter the full VIN into an official Chevrolet parts lookup or ask a GM parts counter to confirm the battery and any auxiliary unit.
- Check the required electrical rating. Select an approved replacement meeting the truck’s specified chemistry and starting requirements. If the original label is missing or aftermarket, rely on the VIN-specific application rather than assuming that the installed battery is correct.
Voltage alone does not establish battery health. Use a battery test and check charging and cable connections.
If the truck starts slowly or the battery repeatedly discharges, our guide to how long a truck battery should last explains the effects of climate, short trips, and electrical loads. Match the battery first, then investigate the cause of the failure.
Which Silverado Battery Size Should You Choose
The Chevy Silverado battery size chart by year narrows the possibilities, but does not establish interchangeability. Older Silverados often use Group 75, 78, or 34/78. Many 2008–2014 trucks list H6, while later models add H7 and H8 choices.
Verify the original group and chemistry by VIN when the label is missing or options conflict. Then compare products in our best battery for Chevy Silverado 1500 guide. Buy only after fitment is confirmed.
Chevy Silverado Battery Size Frequently Asked Questions
What Battery Size Does a 2026 Chevy Silverado Use?
The 2026 Silverado 1500 does not have one publicly verified universal BCI group. Group 94R/H7 is a common gasoline-truck replacement candidate and Group 49/H8 is a diesel candidate, but the exact group requires a VIN-specific check. GM documents AGM chemistry and separate 730- and 850-CCA OE ratings for gas and 3.0L diesel engines.
What Battery Group Fits a 2018 Silverado 1500?
Group 48/H6 and Group 94R/H7 both appear in 2018 Silverado 1500 replacement catalogs. Fitment varies by engine and application, so neither number should be assumed for every 2018 truck. Read the original battery label and confirm tray and terminal positions before replacing it.
Does the 3.0L Duramax Use a Group 49 Battery?
A Group 49/H8 AGM is listed for the 2022 and 2023 Silverado 1500 with the 3.0L Duramax. However, the 2020 catalog also lists H7 alternatives, and 2021 lists H7 replacement options. Do not apply the 2023 H8 specification to an earlier truck without checking its VIN and battery label.
Can a Group 94R Replace a Group 48 Battery?
Not automatically. Group 94R/H7 is approximately 1.5 inches longer than Group 48/H6, so the battery tray, hold-down, and cable positions must allow it. A higher CCA number does not establish interchangeability. Use an approved fitment listing for your exact Silverado configuration.
Do Chevy Silverado Diesel Trucks Have Two Batteries?
Some Silverado HD Duramax configurations use a dual-battery setup, while the 3.0L Duramax Silverado 1500 is a different application. Do not assume all diesel Silverados have two starting batteries. Inspect the truck and verify the battery configuration through its VIN and service information before ordering replacements.
