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I last replaced them with the plugs about 4 years/60-70k miles ago. I bought platinum plugs I if I remember correctly, so I still got some life on those. The car (2001 Buick Regal) is still in good shape just due for a tune up, so if the wires are due to be changed I'll add those to the list.

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According to the 2001 Buick Regal service manual (PDF) spark plugs wires should be inspected at 100K miles, and replaced if necessary (p. 7-15).

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Thanks, I don't even know if I have this manual anymore. I see on page 7-15 I should inspect the wires every 100k, so there's my answer. –  BigHomie Apr 20 '13 at 3:39
Anytime. I have a ton of manuals in my database =). Glad to help. –  cinelli Apr 20 '13 at 5:35

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