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99 suburban, loud metallic noise SOMETIMES

Anthony womack

By Anthony womack
January 8, 2021 in Ask A GM Technician

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Anthony womack

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Anthony womack

Posted January 8, 2021

Posted January 8, 2021

I have a 99 GMC suburban with 116,000 miles on it. It runs beautifully and never had any issues. Recently there has been a single loud metallic clunk/bang when I start it. This is only sometimes, like maybe 1 time a week. After the loud clunk I can start it no problem, and it continues to run like a top. I’m not even sure where to begin with it.

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