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Chevrolet Cruze 12V Automotive Battery Replacement Guide
How to change a weak or dead 12 volt car battery in a second generation 2016 to 2019 GM Chevy Cruze sedan.

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2018 Cruze LT Trunk
Cargo Mat Removed
Spare Tire Exposed
This automotive maintenance tutorial was specifically written to assist owners of the second generation 2016, 2017, 2018 and 2019 GM Chevrolet Cruze in changing a weak or dead 12 volt automotive battery for the Ecotec LE2 1.4 liter turbocharged inline four cylinder engine. (The procedure should be the same or very similar for Cruze models with the LH7 1.6L L4 diesel engine.)

Owners of other General Motors vehicles from Chevrolet, Buick, GMC, Cadillac and Holden such as the Sonic, Spark, Malibu, Impala, Volt, Bolt, Camaro, Corvette, Trax, Equinox, Blazer, Suburban, Tahoe, Traverse, Colorado, Silverado, Express, TrailBlazer, Encore, Regal TourX, Envision, Enclave, LaCrosse, Cascada, Sierra, Canyon, Acadia, Terrain, Yukon, Savana, XT4, XT5, XT6, Escalade, CT5, CTS-V, XTS, CT6, ATS, Astra and Commodore may also find these DIY instructions to be helpful.

The OEM (original equipment manufacturer) 12V battery in this 2018 Cruze LT is a "Group Size" 94R and the part number is ACDelco 94RAGM (also known as ACDelco 3786, GM 88864542 or GM 23423786).

Two other compatible replacement aftermarket 12 volt batteries with their part numbers are as follows: Delphi BU9094R and Exide FP-AGML4/94R.

The tools needed to replace the battery include a 13mm socket, a long extension bar, a 3/8" drive ratchet and a 10mm socket with a 1/4" drive ratchet.

The first two steps are to open the trunk and pull out the carpeted cargo area mat.

Set the mat aside in a safe place.


Two Styrofoam Supports
Remove Styrofoam Pieces
Remove Left Side Piece
Once the cargo area mat has been removed, you'll be able to see the spare tire and two Styrofoam support pieces.

(If you need the floor jack and lug nut wrench, the tire change tool kit is located under the spare tire.)

Gently remove the two Styrofoam support pieces and set them aside in a safe place.

OEM Battery Location
Socket & Extension Bar
Loosen Hold Down Bolt
The 12V battery is situated at the right rear (passenger side) of the cargo area just past the spare tire.

There is a battery hold down bar or "clamp" situated on the right (passenger) side of the battery.

Attach the 13mm socket to a long extension bar (or two shorter bars) and the 3/8" drive ratchet.

Loosen the single bolt that holds the battery clamp in place by turning it in the counterclockwise direction.

You do not have to fully remove the bolt.

Just loosen it at least a few turns until the battery feels like it has been released and can be slid to the left out of the clamp.

Gas Exhaust Vent Tube
Pull Off Plastic Vent Tube
Loosen Negative Terminal
Pull the plastic vent tube out of the right side of the battery.

Since the battery is located in the trunk, this vent tube is necessary to exhaust any gases to outside of the cargo area.

Next, loosen the "-" negative terminal nut by turning it in the counterclockwise direction with a 10mm socket and a 1/4" drive ratchet.

You do not need to remove the terminal nut. Just loosen it a few turns.

Pull Terminal Off Post
Cover & Tuck Away "-"
Raise Flap "+" Terminal
Pull the negative terminal off the "-" battery post.

Wrap the negative terminal in a small towel and tuck it away on the right side of the battery to help prevent accidental contact.

Raise the black plastic flap that covers the "+" positive terminal on the left (driver) side of the battery.

Loosen "+" Terminal Nut
Pull Terminal Off Post
Raise Handles, Lift Battery
Loosen the nut on the positive terminal by turning it in the counterclockwise direction with the 10mm socket and a 1/4" drive ratchet.

Pull the positive terminal off the "+" battery post.

Raise the two plastic handles on the old battery.

Carefully lift the old battery out of the recessed well in the cargo area.


Old Battery Removed
Lower In New Battery
Replace Positive Terminal
Gently lower the old battery down to the ground.

Try to avoid dropping or tipping over the old battery to prevent from damaging it and having acid leak out.

Be sure to take the old battery with you to Walmart or the auto parts stores to avoid having to pay a "core", "recycling", "disposal" or "environmental" fee.

If you can wait a few days for delivery, I recommend buying the OEM ACDelco 94RAGM battery since it has excellent reviews on Amazon. The OEM battery is also equipped with the vent port on the right side for the plastic gas exhaust tube.

It is an AGM (absorbed glass mat) battery which will last longer, be more reliable, deliver higher performance in cold climates and survive deep cycling (discharging) much better than a traditional lead-acid car battery.

Carefully lower the new battery down into the cargo area.

Slide the battery towards the right until it the lower edge is secured below the hold down bar or "clamp"

Tighten the single bolt on the hold down clamp by turning it in the clockwise direction with a 13mm socket, a long extension bar and a 3/8" drive rathchet.

Double check that the new battery can not be moved, slid, rocked or shifted in the recessed well.

If the battery can be moved, make sure that the clamp is over the lower edge of the battery and tighten the bolt an extra turn or two.

The positive "+" battery post should be situated on the left (driver) side and the negative "-" battery post should be located on the right (passenger) side of the cargo area.

If you've had a problem with corrosion (blue or white powder building up on the terminals), I highly recommend installing some felt anti-corrosion washers over the battery posts. They are a cheap preventative measure against having to replace corroded battery cables or terminals.

Push the positive terminal over the "+" battery post on the left.

Tighten the terminal nut by turning it in the clockwise direction with the 10mm socket and a 1/4" drive ratchet.

Push On Negative Terminal
Tighten Terminal Nut
Exhaust Gas Vent Tube
Then push the negative terminal over the "-" battery post on the right.

Tighten the terminal nut in the clockwise direction with the 10mm socket and a 1/4" drive ratchet.

Push In Plastic Vent Hose
Tighten Battery Clamp
New Battery Installed

Push the plastic hose into the hole on the right side of the battery near the negative terminal.

Double check that the two terminals are properly tightened.

Replace Styrofoam Pieces
Two Trunk Mat Supports
Replace Carpeted Mat
Carefully lower in the two Styrofoam pieces that help support the cargo area map.

Slide the carpeted trunk mat back into place.

To test the new battery, start the engine and turn on the headlights.

Please remember to adjust the time on the clock and re-program your favorite radio station presets before you start driving.

Be sure to write down the battery change in your vehicle's service records.

For more, please check out all of my 2016-2019 GM Chevrolet Cruze DIY Repair & Maintenance Guides.

If you found this guide to be helpful, please consider making a small donation by clicking on the "Donate" button located to the right of this paragraph. Thank you!
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