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Old 09-27-2021, 06:15 AM   #2
Palf70Step
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Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,575
Re: What’s this sound? Heater A/C related

Probably a heater vent door actuator (or whatever it is called) thing. Check this thread.

https://67-72chevytrucks.com/vboard/...d.php?t=257463
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Bill
1970 Chevy Custom/10 LWB Fleetside
2010 Toyota Tacoma PreRunner SR5 Double Cab - DD

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