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.

(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.

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.

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.

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.

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.

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.

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

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.

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.