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Disconnect the battery, remove the spark plug cables and boots, and remove the old spark plugs. Throw out the old spark plugs, Put in the new spark plugs, replace the spark plugs cables and boots, and reconnect the battery.

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9y ago
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Wiki User

15y ago

Go bu a Haynes Auto repair Manual.

Consult your local library's on line resources for auto repair.

Wait till the engine is cold like overnight.

Remove one at a time or number the wires with a labe of somekind.

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Q: How do you change the spark plugs in a 2003 Yukon?
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