Spark plugs replacement

2011 CHEVROLET SILVERADO
110,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC
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SPPRICE1
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  • 2 POSTS
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
Jul 15, 2019 at 6:43 PM
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STEVE W.
  • ✓ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
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.
Jul 15, 2019 at 8:04 PM
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SPPRICE1
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Thank you.
Jul 15, 2019 at 8:48 PM
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STEVE W.
  • ✓ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
You are welcome. Please return anytime with your automotive questions.
Jul 16, 2019 at 8:00 AM
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