clicking noise

Asked by Howard Jul 28, 2019 at 02:35 PM about the 2004 Chevrolet Trailblazer LT RWD

Question type: Maintenance & Repair

My 04 trailblazer clicks sporadically  6-7 times when a/c is on and engine
sounds like its running rough at stop lights and stalls suddenly but will start right
up again.
clicking stops when a/c is turned off

1 Answer
11,265

FJ4072 answered 4 years ago

Could you post a video that has sound? I know exactly what a fan clutch tick and the AC compressor tick/click sound like on our platform. The fan clutch is mainly at start up, but is a constant tick tick tick. The AC compressor has a clutch that is supposed to "click", but not too often, could be just low on refrigerant. As far as the stalling, this problem probably started happening after the battery was disconnected for what ever reason. Remove fuses #10 and #28 under the hood. Remove the throttle body and clean it with a sensor safe spray like Seafoam and a rag/nylon brush. That will cure that for the next year or so, or until it gets filthy again.

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