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.
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HOMESERVICE MANUALSCHEVROLET2005TRAILBLAZER 4WD V8-5.3L VIN MREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMSPARK PLUGSERVICE AND REPAIR
2005 Chevrolet TrailBlazer 4WD V8-5.3L VIN M
Spark Plug: Service and Repair
2005 Chevrolet TrailBlazer 4WD V8-5.3L VIN MSECTION Service and Repair
SPARK PLUG REPLACEMENT
REMOVAL PROCEDURE
1. Remove the spark plug wire.
2. Remove the washer solvent container to gain access to the #2 spark plug.
3. Loosen the spark plug 1-2 turns.
4. Brush or using compressed air, blow away any dirt from around the spark plug.
5. Remove the spark plug.If removing more than one plug, place each plug in a tray marked with the corresponding cylinder number.
INSTALLATION PROCEDURE
1. Correctly position the spark plug washer.
2. Inspect the spark plug gap. Adjust the gap as needed.
Spark plug gap: 1.524 mm (0.060 in)
3. Hand start the spark plug in the corresponding cylinder.
4. For used heads, tighten the plug to 15 N.m (11 lb ft).
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten the spark plug.
For NEW heads, tighten the plug to 20 N.m (15 lb ft).
5. Install the spark plug wire.
6. If removed, install the washer solvent container.
RENDER: 1.0x
NO RELATED
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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.