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Changing the spark plugs on 2003 6cyl Envoy XL

Tiny
EBALDEE
  • MEMBER
  • 2003 GMC ENVOY
  • 4.2L
  • 6 CYL
  • AUTOMATIC
  • 168,000 MILES
I would like to change my spark plugs being my vehicle is approximately 168,000 miles on it (which has never been changed), my question is, do I also have to also replace the "coil packs" as well? I am not experiencing any problems that may suggest I have engine problems.
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Monday, February 23rd, 2015 AT 8:07 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You don't need to replace coil packs however I'd change the plug contacts from coil due to mileage and age.
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Monday, February 23rd, 2015 AT 8:34 AM
Tiny
EBALDEE
  • MEMBER
  • 2 POSTS
Thank you. It's really appreciated.
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Monday, February 23rd, 2015 AT 9:10 AM

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