electrical

Battery

for 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD

Editorial review:Chris Hackleman — Master Technician · 20+ years · Jeff Moore — Master Lexus & Toyota Mechanic · 20+ years

Difficulty

Easy

Time

18 min

Tools

Steps

✓Expert-verified. Personally reviewed and approved by OLP's master technicians (Chris Hackleman & Jeff Moore — 20+ years each). Always follow the vehicle's factory service information and torque specs.

Procedure for removing and replacing the 12V auxiliary battery in a 2023 Chevrolet Bolt EUV electric vehicle.

Warnings

⚠️This procedure replaces the 12V auxiliary battery, NOT the high-voltage traction battery. Never attempt to service the high-voltage system without proper training and tools.

⚠Disconnecting the 12V battery will erase radio presets and may require window auto-up/down relearning. Consider using a memory saver device.

⚠The 12V battery is located in the engine compartment. Ensure the vehicle has been off for at least 5 minutes before beginning work.

ℹ️Always disconnect the negative terminal first and reconnect it last to prevent short circuits.

Tools required

10mm socket and ratchetEssential

13mm socket and ratchetEssential

Extension barEssential

Torque wrench (5-20 Nm range)Essential

Battery terminal cleaner or wire brush

Battery terminal protectant spray

Memory saver device (optional)

Parts

12V auxiliary battery × 1 — Group 47 (H5) AGM battery - Use OEM specification
Battery terminal anti-corrosion washers × 2 — Use OEM specification

Preparation

Ensure the vehicle is parked on level ground with the parking brake engaged
Turn off the vehicle completely and remove the key fob from the interior
Wait at least 5 minutes after shutdown to allow all systems to power down
Open the hood and locate the 12V auxiliary battery in the front left corner of the engine compartment
If using a memory saver, connect it to the OBD-II port or 12V accessory outlet before disconnecting battery

Procedure

1
Disconnect the negative battery terminal
Using a 10mm socket, loosen the negative (-) battery terminal bolt. Remove the cable from the battery post and position it away from the terminal to prevent accidental contact. Secure the cable so it cannot fall back onto the post.
Torque spec
Battery Terminal Bolts6 Nm (4 lb-ft)
2
Disconnect the positive battery terminal
Using a 10mm socket, loosen the positive (+) battery terminal bolt. Remove the cable from the battery post. If present, remove any terminal covers or protective boots.
Torque spec
Battery Terminal Bolts6 Nm (4 lb-ft)
3
Remove the battery hold-down clamp
Locate the battery hold-down bracket at the base of the battery. Using a 13mm socket and extension, remove the battery hold-down bolt(s). Lift the hold-down clamp away from the battery and set aside.
Torque spec
Battery Hold-Down Bolt8 Nm (6 lb-ft)
4
Remove the battery from the tray
Carefully lift the battery straight up and out of the battery tray. The battery weighs approximately 40-45 pounds, so use proper lifting technique. Inspect the battery tray for corrosion or debris.
⚠12V batteries are heavy. Use proper lifting technique to avoid injury. Get assistance if needed.
5
Clean the battery tray and terminals
Clean the battery tray of any corrosion, dirt, or acid residue using a damp cloth or baking soda solution if needed. Clean the battery cable terminals using a battery terminal cleaner or wire brush to ensure good electrical contact. Dry all surfaces thoroughly.
6
Install the new battery
Place the new 12V battery into the battery tray, ensuring it is oriented correctly with the positive terminal in the same position as the old battery. The battery should sit flush in the tray with no rocking or movement.
7
Install the battery hold-down clamp
Position the hold-down clamp over the battery base. Install the hold-down bolt(s) and tighten to specification using a torque wrench. Ensure the battery is firmly secured and cannot move.
Torque spec
Battery Hold-Down Bolt8 Nm (6 lb-ft)
8
Connect the positive battery terminal
Place the positive (+) cable terminal onto the positive battery post. Ensure it is fully seated. Install the terminal bolt and tighten to specification using a torque wrench. Do not overtighten as this can damage the terminal or post.
⚠Do not overtighten battery terminal bolts. Excessive torque can crack the battery post or strip the terminal.
Torque spec
Battery Terminal Bolts6 Nm (4 lb-ft)
9
Connect the negative battery terminal
Place the negative (-) cable terminal onto the negative battery post. Ensure it is fully seated. Install the terminal bolt and tighten to specification using a torque wrench. The battery is now reconnected.
Torque spec
Battery Terminal Bolts6 Nm (4 lb-ft)
10
Apply terminal protectant and verify installation
If available, apply battery terminal protectant spray or dielectric grease to both terminals to prevent corrosion. Verify all connections are secure and no tools or parts have been left in the engine compartment. Close the hood.

Reassembly

Ensure both battery terminals are tight and properly torqued
Verify the battery hold-down clamp is secure
Check that no tools or parts remain in the engine compartment
If a memory saver was used, disconnect it after battery installation is complete

Verification

Turn the vehicle on and verify the instrument cluster illuminates normally without warning lights related to the 12V system
Test power windows, door locks, and other electrical accessories to ensure proper function
Check for proper auto-up/down window operation; relearn procedure may be required (hold window switch up for 2 seconds after full close)
Verify radio and clock are functioning; reprogram presets if memory saver was not used
Allow the vehicle to sit for 10 minutes, then restart to confirm the battery holds charge and the vehicle starts normally

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