how to replace the ignition coil in GMC Sierra T1XX (2019-Present)?

Step-by-step guide to replace the ignition coil in GMC Sierra T1XX (2019-Present). Learn about symptoms, diagnostic steps, and necessary tools.

Solution

1. Preparation

• Gather necessary tools and parts.
• Tools Required:
  • Socket set
  • Torque wrench
  • Ratchet and extensions
  • Multimeter
  • OBD-II scanner
• Parts Required:
  • New ignition coils (if necessary)
• Ensure the vehicle is parked on a level surface, and the engine is cool.

2. Disconnect Battery

• Disconnect the negative terminal of the battery to prevent electrical shocks.
• Use a socket to loosen the terminal clamp and remove it from the battery post.

3. Remove Engine Cover (if applicable)

• If the ignition coils are under an engine cover, remove it by unscrewing the bolts or clips holding it in place.
• Gently lift the cover off and set it aside.

4. Remove Ignition Coil

• Locate the ignition coils on the engine.
• Disconnect the electrical connector from the ignition coil by pressing the release tab and pulling it off.
• Remove the bolt(s) securing the ignition coil using a socket or ratchet.
• Gently pull the ignition coil out of the spark plug well.

5. Install New Ignition Coil

• Apply a small amount of dielectric grease to the rubber boot of the new ignition coil.
• Insert the new ignition coil into the spark plug well and press it down until it seats properly.
• Reinstall the bolt(s) to secure the ignition coil and torque them to the manufacturer's specifications (typically around 89 in-lbs but check specific torque specs for your model).
• Reconnect the electrical connector until you hear a click.

6. Reassemble and Test

• If applicable, reinstall the engine cover by aligning it properly and securing it with bolts or clips.
• Reconnect the negative terminal of the battery and tighten the clamp.
• Start the engine to ensure it runs smoothly and check for any warning lights.