2007 Yukon Denali 6.2l Engine Knock After Start-up

GM Customer Service said:

I'm sorry you are experiencing these issues with your dealer. Have you contacted Customer Service regarding this? If not, I would like to set-up a case for you. Please send the following information so I may proceed: your full name, address, phone number, vehicle mileage, VIN and the name and city of your dealer.

I look forward to your reply.

Louis
GM Customer Service

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GM Customer Service said:

DRC,

This is considered normal. The noise is usually noticed on initial start-up when the temperature is below 50 degree Fahrenheit. It may be more pronounced on the first cold start after a long trip. The noise typically disappears within the first 5 - 30 seconds, but may last longer in extreme cold temperatures.

The noise is not detrimental to the performance, reliability or durability of the engine. The noise does not have any affect on the longevity of any of the engine components.

Louis
GM Customer Service

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