Owners of other General Motors vehicles from Chevy, Buick, GMC, Cadillac and Holden such as the Trax, Blazer, Traverse, Tahoe, Suburban, Cruze, Malibu, Impala, Camaro, Cascada, LaCrosse, Encore, Envision, Enclave, Regal, Canyon, Sierra, Terrain, Acadia, Yukon, Savana, XT4, XT5, XT6, Escalade, CTS, XTS, CT6, Astra, Commodore and Trailblazer may also find these DIY instructions to be helpful.

The OEM (original equipment manufacturer) 12V battery group size is "48" (also known as "H6") and the genuine General Motors part number is ACDelco 48AGM.

A compatible replacement aftermarket 12 volt car battery is the Optima DH6 YellowTop AGM.

The tools needed to complete this procedure include a socket set with an 8mm socket, a 10mm socket, a 13mm socket, a short extension bar with a 1/4" or 3/8" drive ratchet and a plastic automotive pry bar tool.

The first two steps are to open the hood and then move to the right (driver) side of the engine bay.

The 12V battery is situated behind the electrical fuse box and in front of the coolant reservoir bottle.

Flip open the plastic cover over the positive "+" terminal.

Swing open the cover from the top of the power distribution board.

Pull the negative terminal off the "-" battery post, wrap it in a small towel and tuck it away behind the battery to help prevent accidental electrical contact.

Pull the positive terminal off the battery post.

Remove the 13mm nut that connects the smaller ring terminal to the larger positive battery terminal by turning it in the counterclockwise direction.

Pull off the positive (red) cable from the power distribution board.

Remove the 13mm nut that secures the negative (black) cable to the power distribution board.

Pull the negative cable off the power distribution board.

Gently pry up on the retaining clips that secure the power distribution board's case with the plastic pry bar tool.

You'll still need to disconnect the small ring terminals.

Slide out the red plastic lock tab.

Push in the black plastic release tab and remove the electrical connector from its socket.

Set the wire and connector assembly aside with the other pieces that were removed.

Loosen the three small nuts on the power distribution board with the 8mm socket and a 1/4" drive ratchet.

The small 8mm nuts are "captured" and will remain attached to the board.

Lift the power distribution board off the top of the old battery and set it aside in a safe place.

One nut is located on the right side of the battery and the other is situated at the front edge.

Remove the two nuts by turning them in the counterclockwise direction with a 10mm socket and a ratchet.

Lift the hold down bar off the top of the old battery.

Remove the hook on the rear edge of the clamp from its slot attached to the battery tray.

Set the hold down bar aside in a safe place.

Set it aside for re-installation later on.

Raise the two plastic handles on the top of the old battery.

Carefully lift the old battery out of the engine bay.

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

The original battery in this 2018 Equinox Premier (Ecotec 1.5L Turbo I4 engine) was the ACDelco 48AGM.

Clean off any debris on the battery tray so that the new battery will rest evenly on it.

Avoid making contact with the battery posts to prevent from being electrocuted. I'd recommend wearing gloves.

The negative "-" battery post should be situated on the right (driver) side of the engine bay and the positive "+" battery post should be closer to the left (passenger) side of the car.

Lower the plastic heat shield box over the new battery.

Re-insert the hook at the rear edge into its corresponding slot.

Lower the two holes over the threaded posts at the right side and front edge of the hold down bar.

Tighten the nuts with the 10mm socket and a ratchet until they are snug.

Push down on the board to secure the plastic retaining clips.

Replace the three small ring terminals to the left side.

Make sure that the "1", "2", "3", etc. numbers match up.

Tighten the 8mm nuts in the clockwise direction until they are snug.

If you've had a problem with corrosion (white or blue powder) building up on the terminals, I highly recommend installing some felt anti-corrosion washers over the battery posts.

They are cheap insurance against having to replace the battery terminals, cable or 12V battery prematurely.

Re-attach the small wire harness.

Slide the electrical connector back into its mounting bracket.

Tighten the nut in the clockwise direction with the 10mm socket and a ratchet until it is snug.

Try to avoid over tightening the terminal nut to prevent from cracking the battery post which could lead to an acid leak.

Swing the hinged black plastic cover over the power distribution board.

Pop the small cover back into place over the positive terminal.

Tighten the nut in the clockwise direction with the 10mm socket and a ratchet until it is snug.

Double check that the new battery can not be moved, slid or rocked on the tray. If the new battery can be moved, tighten the nuts on the hold down clamp an extra turn or two.

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

If you suspect that your alternator is failing, use a digital multimeter tool to check the voltage when the engine is running.

If the alternator is working properly, the voltage on the battery terminals should be about 13V to just over 14V when the engine is running. If the engine is turned off, the new battery should read over 12 volts.

For more, please check out all of my 2018-2022 GM Chevrolet Equinox DIY Repair & Maintenance Guides.