🔧 Ignition Coil Replacement

Your Equinox uses four individual ignition coils mounted on top of the engine. Replacing them is straightforward, but you need to work carefully around the ignition system and remove the engine cover and coil connectors in order.

Difficulty Level: Beginner | Estimated Time: 1-2 hours

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⚠️ Safety & Precautions

• Turn the ignition off and remove the key/fob before starting.
• Let the engine cool completely before touching the coils or spark plugs.
• Disconnect the negative battery cable before unplugging coil connectors. This helps prevent accidental spark or electrical damage.
• Do not pull on the wiring. Release each connector lock first.
• If the engine has been misfiring badly, do not drive it for long before repair. It can damage the catalytic converter.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• Ratchet
• Short extension
• Flat-head screwdriver
• Trim tool
• Torque wrench
• Dielectric grease
• Gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 4
• Ignition coil boot - Qty: 4
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Make sure the engine is completely cool.
• Open the hood and remove any loose items near the engine bay.
• Disconnect the negative battery cable with a 10mm socket.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover

• Pull up on the engine cover or remove it with a trim tool if it is tight.
• Set it aside in a safe place.

Step 2: Disconnect the battery

• Use a 10mm socket and ratchet to loosen the negative battery terminal.
• Move the cable aside so it cannot spring back onto the post.

Step 3: Remove each coil connector

• Press the lock tab on each ignition coil connector.
• If needed, use a flat-head screwdriver to gently release the lock.
• Unplug all four connectors one at a time.

Step 4: Remove the ignition coils

• Use a 10mm socket, ratchet, and short extension to remove the coil hold-down bolts.
• Lift each coil straight up and out of the spark plug tube.
• Twist gently if a coil sticks.

Step 5: Inspect the spark plug wells

• Look for oil, water, or cracked boots in the plug wells.
• If you see oil in the wells, the valve cover gasket may also need attention.

Step 6: Install the new coils

• Apply a small amount of dielectric grease inside each new coil boot.
• Slide each coil straight down onto its spark plug.
• Install the coil bolts by hand first.
• Use a torque wrench to tighten the coil bolts to 10 Nm (89 in-lbs).

Step 7: Reconnect the coil connectors

• Push each connector on until it clicks.
• Make sure each one is fully seated and locked.

Step 8: Reconnect battery and reinstall cover

• Reconnect the negative battery cable with a 10mm socket.
• Reinstall the engine cover by pressing it into place.

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✅ After Repair

• Start the engine and listen for smooth idle.
• Check the check engine light. If it stays on, scan for codes and clear them after confirming the repair.
• Take a short test drive and confirm the misfire is gone.
• If the misfire returns, the spark plugs or wiring may also need inspection.

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💰 DIY vs Shop Cost

Shop Cost: $300-$650 (parts + labor)

DIY Cost: $120-$280 (parts only)

You Save: $180-$370 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1-2 hours.

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🎯 Ready to get started?

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