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Chevrolet Equinox Spark Plugs Replacement Guide
How to change the spark plugs in a 3rd generation 2018 to 2022 GM Chevy Equinox with the Ecotec 1.5L I4 engine.

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Paul B. Michaels
Author & Photographer
Auto Mechanic Since 1989

2018 Equinox 1.5L I4
Bolt - Front Right Corner
Loosen Counterclockwise
This automotive maintenance tutorial was specifically written to assist owners of the third generation (2018, 2019 and probably also the face-lifted or revised 2020, 2021 and 2022 model years) GM Chevrolet Equinox SUV in checking or changing the spark plugs in the Ecotec 1.5 liter turbocharged four cylinder engine. The procedure may be the same or very similar for the 2.0L turbo I4 engine or the 1.6L I4 diesel engine.

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 original "OEM" spark plugs in this 2018 Equinox Premier were the ACDelco 41-153 iridium.

Another compatible replacement spark plug is the ACDelco 41-156 "Professional" iridium.

The tools and other items needed to complete this procedure include a Torx T30 star bit screwdriver, a 10mm socket with a 1/4" drive ratchet, a 9/16" spark plug socket with an extension bar, a 3/8" drive ratchet and a tube of dielectric grease.

The first two steps are to open the hood and then locate the black metal bolt at the front right (driver side) corner of the black plastic engine cover.

Loosen the bolt by turning it in the counterclockwise direction with the Torx T-30 screwdriver.


Metal Bolt Removed
Remove Oil Fill Cap
Pull Off Engine Cover
Set the black metal bolt aside in a safe place.

Then remove the oil fill cap by twisting it in the counterclockwise direction.

Carefully pull the plastic cover off the top of the engine.

Plastic Cover Removed
Foam Rubber Cover
Rubber Cover Removed
Set the plastic engine cover aside in a safe place.

Next, pull off the foam rubber noise and vibration reducing cover from the top of the engine.

Set the rubber cover aside with the plastic cover.

Replace Oil Filler Cap
Four Ignition Coils
Left Ignition Coil
I recommend replacing the oil fill cap to help prevent from having debris fall down into the engine.

Rotate the oil fill cap in the clockwise direction to secure it into place.

If you have access to compressed air or a wet/dry shop vacuum, clean off the top of the engine.

Once the two covers are out of the way, you'll be able to see the four ignition coils.

I prefer to only check or change one spark plug at a time to help further reduce the risk of having debris or other foreign objects fall down into the spark plug well or the cylinder.

Slide Out Red Lock Tab
Push In Release Tab
Second Ignition Coil
Slide the red locking tab on the electrical connector straight out to unlock the power plug.

Then push down on the black plastic release tab before sliding the electrical connector straight off the ignition coil.

Sliding Out Red Lock Tab
Pull Off Electrical Connector
Power Plugs Removed
Since there are such tight clearances between the ignition coils, I also removed the second ignition coil as well to create more working room.

Repeat the process of sliding out the red lock tab and push down the black release tab to remove the electrical connector.

Loosen Counterclockwise
Ignition Coil Bolt Removed
Lift Out Ignition Coil
Loosen the single silver metal bolt that holds each ignition coil in place by turning it in the counterclockwise direction with the 10mm socket, a short extension bar and a 1/4" drive ratchet.

Set the ignition coil bolt aside in a safe place.

Gently pull the ignition coil straight out of the spark plug well.

If the rubber boot at the bottom of the ignition coil seems to be stuck or "frozen" to the top of the old spark plug, try gently rotating the ignition coil back and forth or wiggling it while you pull up.

If you have a SES or CEL (service engine soon / check engine light) and your OBD2 or OBDII scanner reveals that the DTC (diagnostic trouble code) is related to the ignition coils such as P0351, P0352, P0353 or P0354, you may need to replace a faulty ignition coil.

The General Motors OEM (original equipment manufacturer) part number for the ignition coils is ACDelco 12635672.

Set the ignition coil aside in a safe place.

Slanted Spark Plug Well
Remove Other Bolt(s)
Slide Out Ignition Coil
Since the spark plug wells are slanted (angled or curved) with a bent elbow section, I found it necessary to remove the second ignition coil.

Set the other ignition coil aside with the first one.

Loosen Counterclockwise
Spin Out Old Spark Plug
Old Spark Plug Removed
Attach the 9/16" spark plug socket to the extension bar and a 3/8" drive ratchet.

Carefully loosen the old spark plug by turning it in the counterclockwise direction.

If you have trouble loosening the old spark plug that might be a bit rusted in place, try spraying in small amount of penetrating oil into the spark plug well.

Allow the penetrating oil to seep down into the threads for at least five to ten minutes before attempting to loosen the spark plug again.

Once the old spark plug is loose, detach the ratchet and spin it out the rest of the way by hand.

Lift the old spark plug out of the well and detach it from the socket.

Inspect Old Spark Plug
Lower In New Spark Plug
Tighten Clockwise
Inspect both ends of the old spark plug.

If the electrode tip of the old spark plug appears to be oily or covered in soot, the engine may be burning oil and should be inspected a professional mechanic.

If the electrode of the spark plug appears to white or ashy, the engine may have experienced overheating. It would be best to have the cooling system inspected.

The OEM spark plugs in this 2018 Equinox Premier with the Ecotec 1.5L turbo I4 engine were the ACDelco 41-153 iridium plugs. (Also known as part number GM 12673527.)

You could also use the "Professional" version of the OEM spark plug which is part number ACDelco 41-156.

If you have a spark plug gap gauge, check the gap on the new spark plugs to make sure they match the specification on the box.

Push the new spark plug into the socket. Your spark plug socket should have a rubber insert or a strong magnet to securely hold the new plug in place.

Carefully lower the new spark plug down into the well.

Try to avoid hitting the electrode tip against the spark plug well or the cylinder head.

Spin in the new spark plug a few turns by hand in the clockwise direction to help prevent it from becoming cross threaded.

Attach the 3/8" drive ratchet to the extension bar.

Tighten the new spark plug in the clockwise direction to just past the point when you feel the new crush washer collapse.

If you are re-installing the old spark plugs after checking their condition, tighten the plugs to just a fraction of a turn past finger tight.

Try to avoid over tightening the spark plugs.

If you choose to use anti-seize lubricant, remember to use less force when tightening the spark plugs. Most spark plug manufacturers do not recommend using anti-seize since it can easily lead to over tightening.

Double check that the spark plugs are tight before moving on to the next steps.


Apply Dielectric Grease
Lower In Ignition Coil
Push Down To Secure
Turn over the ignition coil assembly so that you can access the rubber dust boot.

Apply a small amount of dielectric grease to the opening in the rubber dust boot.

The dielectric grease will help ensure a reliable connection by keeping out any moisture or dust.

Lower the ignition coil down into the spark plug well and push it over the top of the new spark plug.

Rotate the ignition coil back and forth a few times to help spread the dielectric grease.

Replace Metal Bolt
Spin In Clockwise
Replace Other Ignition Coil
Line up the bolt hole in the ignition coil housing with the corresponding hole in the top of the engine.

Spin in the ignition coil bolt a few turns by hand in the clockwise direction to help prevent from having it become cross threaded.

Replace Bolt
Tighten Bolt Clockwise
Tighten Other Bolt
Tighten the bolt in the clockwise direction with the 10mm socket, an extension bar and the 1/4" drive ratchet until it is snug.

Try to avoid over tightening the bolt to prevent from cracking the plastic ignition coil assembly.

Repeat the steps to replace the other ignition coil.

Push On Power Plug
Slide In Red Lock Tab
Connector Secured
Slide the power plug straight into the socket on the ignition coil.

You should feel or hear the electrical connector "click" securely into place.

Slide the red plastic lock tab straight in towards the ignition coil to secure the electrical connector in place.

Replace Other Connector
Ignition Coils Replaced
Replace Rubber Cover
Double check that the electrical connectors are securely in place.

Lower the foam rubber cover back into place.

Remove Oil Fill Cap
Push On Plastic Cover
Replace Oil Fill Cap
Temporarily remove the oil fill cap by turning it in the counterclockwise direction.

Lower the black plastic engine cover back into place over the top of the motor.

Replace the oil filler cap by twisting it on in the clockwise direction until it is snug.

Spin In Black Bolt
Tighten Clockwise
Spark Plugs Replaced
Replace the single black metal bolt by turning it in the clockwise direction with the Torx T-30 screwdriver until it is snug.

Try to avoid over tightening the Torx bolt to prevent from cracking the plastic engine cover.

Start the engine and listen closely for any strange sounds or noises that might indicate a problem such as a loose spark plug or a disconnected electrical connector.

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

The service manual and owner's manual specification for the spark plug replacement interval for the OEM iridium electrode plugs is 60,000 miles (96,000 Km) for both the normal and severe maintenance schedules.

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

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