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Spark plugs replacement

Tiny
SPPRICE1
  • MEMBER
  • 2011 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 110,000 MILES
I am replacing spark plugs and GM said the correct plug is the Delco 41-162 Iridium are these plugs pre-gaped and what would be the correct gap? It also says not to attempt to gap these plugs, bought 8 and two are gaped all the way down. Any advice would help before installing. Thanks
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Monday, July 15th, 2019 AT 6:43 PM

3 Replies

Tiny
STEVE W.
  • MECHANIC
  • 13,463 POSTS
Welcome to 2CarPros. If two of the plugs were damaged in shipping or from the parts house I would return them, it is very easy for the core and porcelain to be damaged that way. You could install them and suddenly have a misfire code due to the plugs. If you are sure they are okay and decide to continue you can find the plug gap on the emissions label under the hood. Or use.040 in or 1.02 mm which is the GM specification.
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Monday, July 15th, 2019 AT 8:04 PM
Tiny
SPPRICE1
  • MEMBER
  • 2 POSTS
Thank you.
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Monday, July 15th, 2019 AT 8:48 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,463 POSTS
You are welcome. Please return anytime with your automotive questions.
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Tuesday, July 16th, 2019 AT 8:00 AM

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