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Discussion Starter · #1 ·
About 4 days ago, Ive got an unusual clicking sound coming from under the hood. It happens when I start the truck, doesnt matter if its been sitting or its been driven around town, the click is there for about 10 seconds or so. I had some time this morning to check it out and found this module doing the clicking. In the pic, its on the firewall with 2 hoses on both sides. From what I can tell, the truck runs normally but the clicking just got me puzzled. Can you guys tell me what that part is and if its normal for the clicking?

 

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I had a clicking sound in my T when I floored it.. And a very slight one when at idle with the hood open.
 

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that is the valve that opens when you turn on your heater to let coolant into the heater core. Not sure why it would be clicking.
 

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Discussion Starter · #4 ·
I got to look under there today and when I unplugged it, I started the truck and there was no clicking noise. Plugged it back in and the clicking came back. Help?!?!?
 
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