changing the spark plugs on 2003 6cyl Envoy XL

2003 GMC ENVOY
168,000 MILES • 4.2L • 6 CYL • AUTOMATIC
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EBALDEE
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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.
Feb 23, 2015 at 8:07 AM
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HMAC300
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you don't need to replace coil packs however I'd change the plug contacts from coil due to mileage and age.
Feb 23, 2015 at 8:34 AM
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EBALDEE
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Thank you...it's really appreciated.
Feb 23, 2015 at 9:10 AM
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