how do u change plugs on a gmc envoy
spark plugs on 2003 GMC Envoy
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
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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....