Oil on spark plug 2002 gov envoy

Asked by Mar 07, 2015 at 02:03 PM about the 2002 GMC Envoy XL

Question type: Maintenance & Repair

2 Answers

148,915

If it's not misfiring maybe valve guide seal(s) on that cylinder, and possibly but not as likely-- piston rings

40,725

Miles on vehicle?

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