2004 Chevrolet Avalanche 1500 Q&A

2004 Chevrolet Avalanche 1500 Question: I had a scan done for the check engine light and was told it was the knock senso

The check engine light stays on all the time. I had it scanned and was told it was Kock Sensors (x2). What is the knock sensors and how is it repaired and about how much is the cost? -
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