🔧 Armada - Ignition Coil Replacement

On your Armada, each cylinder has its own ignition coil (coil-on-plug) that sits directly on top of the spark plug. Replacing a coil is usually straightforward, but access can vary depending on which cylinder (some can require removing the upper intake assembly).

Difficulty Level: Intermediate | Estimated Time: 0.5-3.0 hours

---

⚠️ Safety & Precautions

• ⚠️ Work on a cool engine to avoid burns.
• ⚠️ Keep the key away from the vehicle while unplugging ignition components.
• ⚠️ Disconnect the negative battery cable before unplugging coils to reduce risk of shorting electronics.
• ⚠️ Don’t pull on wiring; release the connector lock tab first.

---

🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4" drive ratchet
• 6" extension (1/4" drive)
• Trim clip removal tool
• Small flat-blade screwdriver
• Torque wrench (inch-pound)
• Torque wrench (foot-pound)
• Needle-nose pliers
• Flashlight
• Nitrile gloves
• Safety glasses

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 1 (or Qty: 8 if replacing all)
• Dielectric grease - Qty: 1
• Spark plugs - Qty: 8 (optional, if due)

---

📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Open the hood and let the engine fully cool.
• Disconnect the negative battery cable using a 10mm socket.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Confirm which coil(s) you’re replacing

• Some coils are easy to reach; others may require removing the upper intake assembly.
• Tell me if you’re replacing one coil (and which cylinder/misfire code like P0301–P0308) or all eight.

Step 2: Remove the engine cover (if equipped)

• Remove any retaining fasteners using a 10mm socket (if present), then lift the cover off by hand.

Step 3: Gain access to the coil

• Use a trim clip removal tool to release any intake duct clips and move hoses/wiring aside gently.
• If you need to loosen a hose clamp, use a small flat-blade screwdriver.

Step 4: Unplug the coil electrical connector

• Press the connector lock tab (sometimes called a “release tab,” meaning the small latch that holds the plug on) and pull the connector straight off.
• If the tab is stubborn, carefully assist with a small flat-blade screwdriver (don’t break the tab).

Step 5: Remove the coil hold-down bolt

• Remove the coil bolt using a 10mm socket, 1/4" drive ratchet, and 6" extension.
• Lift the coil straight up to remove it.

Step 6: Install the new coil

• Apply a tiny smear of dielectric grease inside the new coil boot (the rubber sleeve that seals to the spark plug).
• Push the coil straight down until fully seated on the spark plug.
• Reinstall the bolt using a 10mm socket and snug it evenly.
• Reinstall the connector until it clicks.

Step 7: Reassemble and reconnect the battery

• Reinstall any ducts/clips you moved using the trim clip removal tool.
• Reinstall the engine cover.
• Reconnect the negative battery cable using a 10mm socket.

---

✅ After Repair

• Start the engine and verify it idles smoothly.
• If you had a check engine light, confirm the misfire is gone after a short test drive.
• If the light returns, the next checks are spark plug condition and coil connector/wiring fitment.

---

💰 DIY vs Shop Cost

Shop Cost: $250-$900 (parts + labor, depending on how many coils and access)

DIY Cost: $60-$640 (parts only, depending on how many coils)

You Save: $190-$260+ by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-3.0 hours.

---

🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.

---

Quick questions so I can give you the exact steps + correct torque specs for your Armada:

• 🧰 Are you replacing one coil or all eight?
• 🔎 If it’s one coil, what misfire code are you seeing (example: P0306)?