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 MANUALSCHEVROLET2007SILVERADO CLASSIC 1500 4WD V6-4.3LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMSPARK PLUGSERVICE AND REPAIR
2007 Chevrolet Silverado Classic 1500 4WD V6-4.3L
Spark Plug: Service and Repair
2007 Chevrolet Silverado Classic 1500 4WD V6-4.3LSECTION Service and Repair
SPARK PLUG REPLACEMENT
REMOVAL PROCEDURE
1. Disconnect the spark plug wire from the spark plug.
1. Twist the boot 1/2 turn before removing the boot.
2. Pull only on the boot or use a tool designed for this purpose in order to remove the wire from the spark plug.
2. Loosen the spark plug 1 or 2 turns.
3. Brush or air blast away any dirt from around the spark plug.
4. Remove the spark plug. If removing more than 1 plug, place each plug in a tray marked with the corresponding cylinder number.
INSTALLATION PROCEDURE
1. Ensure that the spark plug washer is positioned correctly.
2. Inspect the spark plug gap. Adjust the gap as needed.
Spark plug gap: 1.524 mm (0.060 in)
NOTE: Refer to Fastener Notice.
3. Hand start the spark plug into the corresponding cylinder.
4. Tighten the spark plug.
- For used heads, tighten the plug to 15 N.m (11 lb ft).
- For new aluminum heads, tighten the plug to 20 N.m (15 lb ft).
- For new iron heads, tighten the plug to 30 N.m (22 lb ft).
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.