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Spark plugs I was going to replace my plugs in a 2004 Chevy Silverado 2500 HD 6 litre when I noticed a metal housing (maybe some kind of heat sheild) around the area where the plugs would enter the block. The wires are hard to release from this sheild. does the sheild come off with the wires or do they stay in place. I didnt want to tug real hard on the wires not knowing what may happen. Could you answer my problem and maybe a tip on how to remove? Thanks, Craig

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The heat shields are attached to head under spark plug. Need to turn boot on wire all around & then wiggle back & forth & pull upward.

Posted on Jul 13, 2010


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