Scotty, Thank you for your last reply but a new(old) problem has come to my attention. I have a 2003…

Scotty, Thank you for your last reply but a new(old) problem has come to my attention. I have a 2003 Chevy Trailblazer LT and only when the vehicle is being driven there is this clicking noise coming from under the hood. No matter what speed, fast or slow, the car is going it still clicks the same rate about 2 times a second. Just wondering what your thoughts are.

it cut off your question

here it is now, remove the fan belts first, if noise goes away,, find out which pulley is bad. If it stays, it's internal to the engine like bad lifters

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