2017 GMC 2500 HD spark plug wear ?

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Posted to Technical Discussion Forum on 12/23/2021 12 Replies

1GT22TEG6HZ197015 6.0 Liter 60,000 miles on truck Original spark plugs Front two spark plugs on each bank had excessive center electrode wear

[Spark plugs]

Any thoughts?

Impact of Grade assist engine braking?

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