Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2004 GMC Envoy RWDFACTORY OEM SERVICE PROCEDURE

Removal Procedure

Remove the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement .

Fig 1: Disconnecting/Connecting Ignition Coil Electrical Connectors

Courtesy of GENERAL MOTORS CORP.

Disconnect the ignition coil connectors (1) from the ignition coils.
Remove the retaining bolts (2) from the ignition coils.

Fig 2: Removing/Installing Ignition Coils

Courtesy of GENERAL MOTORS CORP.

Remove the ignition coils (1) from the engine.

Factory Service Tools

Use the Manual With the Right Hardware

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.