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Re: GM 'W' Body 3.4L Rear Spark Plugs!!
Posted to Technical Tips Forum on 8/16/1998 3 Replies

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It's really not as bad as it looks. It takes about an hour to R&R the upper plenum and replace the rear plugs and since the plugs are platinum the tune up is not due til 100k miles at which time it wo... Login to read more.

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