Any advice to determine clacking sound

I have a 1999 Sonoma 4.3 V6 with 4WD. I replaced the water pump on it, and then while I was testing it, it started running hot, and it is still making a clacking sound.
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I have a 1999 Sonoma 4.3 V6 with 4WD. I replaced the water pump on it, and then while I was testing it, it started running hot, and it is still making a clacking sound.
Answers