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spark plugs on 2003 GMC Envoy

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how do u change plugs on a gmc envoy
(2) Answers
LIKE I STATED BEFORE I REGISTERED.TO GO TO YOUTUBE AND SEE IT DONE LIVE BY A CAR SPECIALIST.JUST TYPE IN THE MODEL OF YOUR CAR FOLLOWED BY SPARK PLUG REPLACEMENT
go to youtube and type out spark plug replacement on gmc envoy 4.2L 6cyl. and it will show you step by step..thats how i did it and it's so easy....