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.
2005 Chevrolet Avalanche 2500FACTORY OEM SERVICE PROCEDURE
Removal Procedure
- Remove the spark plug wire. Refer to Spark Plug Wire Replacement .
- Loosen the spark plug 1 or 2 turns.
- Brush or using compressed air, blow away any dirt from around the spark plug.
- Remove the spark plug. If removing more than one plug, place each plug in a tray marked with the corresponding cylinder.
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.