1999 GMC Sierra spark plugs

1999 GMC SIERRA
60,000 MILES • V8 • 4WD • AUTOMATIC
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BMOHN17
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my owners manual says to gap the plugs to .060, but the spark plugs i purchased say to gap them at .040. I double checked and they are the correct plugs. Out of the box the plugs are at about .042. What should i do
Jun 6, 2010 at 8:00 PM
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RASMATAZ
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Gap it at .060


https://www.2carpros.com/forum/automotive_pictures/12900_gap_1.jpg

Jun 6, 2010 at 8:05 PM