Where is the auxiliary battery on a 2017 Impala?
On a 2017 Impala, the auxiliary battery is typically located in the trunk on the passenger side if the car is equipped with a start-stop system. If your model does not have the start-stop system, there is no separate auxiliary battery—the vehicle uses a single 12‑volt battery in the engine bay.
The auxiliary battery, when present, powers onboard electronics and helps the start-stop system run without drawing excessive power from the main battery. Exact placement can vary by trim and market, so it’s best to verify with the owner’s manual or a dealer if you’re unsure.
What is an auxiliary battery and why it matters
An auxiliary battery is a secondary 12-volt battery designed to supplement the main battery, particularly for vehicles with start-stop technology or heavy auxiliary loads. In the Impala, it can help offset power draw when the engine is off or when multiple systems are in use, reducing strain on the primary battery.
Where to look in a 2017 Impala
Locations vary depending on whether the vehicle is equipped with start-stop. If present, the auxiliary battery is commonly housed in the trunk area on the passenger side, often behind trim or under a floor panel near the spare tire or wheel well. If your car lacks the start-stop option, you may not have a separate auxiliary battery at all.
- Trunk area on the passenger side near the spare tire well
- Behind a removable trunk-side trim panel or under a floor panel in the trunk
- Adjacent to the spare tire compartment, sometimes with a protective cover or label
To confirm the exact location, consult the owner’s manual for your specific trim, or ask a Chevrolet service representative. If you don’t see a second battery in the trunk and your vehicle has start-stop indicators in the cluster, it may still house a separate auxiliary battery in a different configuration, but many 2017 Impalas rely on a single battery in the engine bay.
How to safely access and inspect
Accessing the auxiliary battery (if present) should be done with the vehicle off and keys removed. Disconnecting the negative terminal first is recommended to reduce the risk of short circuits. Wear eye protection and gloves, and avoid touching the battery terminals with metallic objects.
- Park on a level surface and engage the parking brake.
- Open the trunk and locate the side area on the passenger side (or follow the manual’s instructions).
- If a cover or panel is present, remove it to reveal the battery and its mounting tray.
- Inspect for corrosion on terminals and ensure the hold-down strap is secure.
If you’re not confident performing an inspection or battery work, contact a qualified technician. Incorrect handling can cause electrical shock or fire hazards.
Model variations and verification
Not all 2017 Impala models include an auxiliary battery. The presence and location can depend on the engine, trim level, and market. When in doubt, verify with the owner’s manual or a Chevrolet dealer service department. They can confirm whether your specific vehicle has a secondary battery and its exact placement.
Summary
The primary 12-volt battery for a 2017 Impala sits in the engine bay. If your model has start-stop or related systems, a secondary (auxiliary) battery is usually located in the trunk on the passenger side, behind trim or under a floor panel near the spare tire area. Some trims may not include an auxiliary battery at all. Always check the owner’s manual or consult a dealer to confirm the exact configuration for your vehicle.
Does Impala have two batteries?
Using the Start-Stop equipped 2015 Impala as an example, it will deploy two batteries to meet its electrical demands: a larger, 12 Volt AGM primary battery and a small, auxiliary 12 Volt AGM battery, which powers electric accessories during an Auto Stop event.
What does the auxiliary battery do in an impala?
An auxiliary battery is essential for running and powering car systems and accessories. The auxiliary battery powers systems and accessories that need 12 volts of power. These include headlights, audio systems, computer controls, and accessory systems.
Where are auxiliary batteries located?
As is the case with many ordinary single battery vehicles that have wide variations in battery location, auxiliary batteries can be mounted just about anywhere. Single battery vehicles might have the battery in the trunk, under the back seat, hidden in the wheel well in front of the left front tire, and other places.
Where is the auxiliary battery on a 2017 Chevy Impala?
One is the standard battery located under the hood, while the other is the auxiliary battery situated in the left rear side trim compartment of the trunk. To access the trunk's auxiliary battery, you need to remove the left trim panel, then take out the battery hold down, and finally disconnect the terminals.
