Chevrolet Trailblazer Battery Size by Year
Every Chevrolet Trailblazer year we cover (2021-2026) uses a BCI Group 48 AGM battery.
Battery by model year
| Model years | Battery | Type | CCA | Buy |
|---|---|---|---|---|
| 2021-2026 | Group 48 | AGM | 660-760 | Shop Group 48 |
Match the group and type on the battery you are removing. Shop links go to Amazon, and we may earn a commission at no extra cost to you. Open your exact year below for CCA, terminals and our sources.
Where the battery is
2021
The manual does not say where the battery sits, only where to connect jumper cables.
To jump-start: jump-start positive terminal in engine compartment, driver side (under a cover).
Chevrolet's manual: "The jump start positive terminal (2) on the discharged battery is in the engine compartment on the driver side of the vehicle." 2021 Chevrolet Trailblazer Owner Manual
Every Trailblazer year
Choose your model year for the exact Group size, CCA, terminal layout, and the right replacement for your Chevrolet Trailblazer.
Sources. The battery size for 6 of 6 model years is checked against a cited source, most often GM OE Battery Ratings 2025 (TechLink PDF) and PowerTex. Each year page lists its own sources.
Last verified 2026-09-23. Maintained by Matan B., who runs GarageDex. How we verify.