What’s this sound? Heater A/C related - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1974StepSide · 09-24-2021, 10:22 PM

https://twitter.com/biggmoe/status/1...923069955?s=21https://twitter.com/biggmoe/status/1441587117923069955?s=21

1996 Tahoe just started making this sound this morning. It’s coming from the passenger side under dash area. I posted a video on the link above. Initially thought it could be a blend door actuator, but it’s so loud.
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**Palf70Step** · 09-27-2021, 06:15 AM

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

https://67-72chevytrucks.com/vboard/...d.php?t=257463

1974StepSide · 10-01-2021, 11:23 PM

Quote:

Originally Posted by Palf70Step

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

https://67-72chevytrucks.com/vboard/...d.php?t=257463

Thank you, I’ll check it out.
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**special-K** · 10-09-2021, 09:23 AM

I've heard odd noises coming from that area before in my '95. Not that loud or as repetitive or rapid. I figured it was some issue with a flapper actuator. I never figured it out. I don't think I've heard it in a while but this thread made me think of it.

**hatzie** · 10-11-2021, 02:46 PM

Sounds like the blend door actuator on my Impala when it failed.
The plastic gears strip out and then it sits there and clatters.

09-24-2021, 10:22 PM	#1
1974StepSide Play it Loud... Join Date: Aug 2002 Location: East San Jose, CA Posts: 465	What’s this sound? Heater A/C related https://twitter.com/biggmoe/status/1...923069955?s=21https://twitter.com/biggmoe/status/1441587117923069955?s=21 1996 Tahoe just started making this sound this morning. It’s coming from the passenger side under dash area. I posted a video on the link above. Initially thought it could be a blend door actuator, but it’s so loud. Posted via Mobile Device

09-27-2021, 06:15 AM	#2
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 46,609	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 __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

10-09-2021, 09:23 AM	#4
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: What’s this sound? Heater A/C related I've heard odd noises coming from that area before in my '95. Not that loud or as repetitive or rapid. I figured it was some issue with a flapper actuator. I never figured it out. I don't think I've heard it in a while but this thread made me think of it. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

10-11-2021, 02:46 PM	#5
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,912	Re: What’s this sound? Heater A/C related Sounds like the blend door actuator on my Impala when it failed. The plastic gears strip out and then it sits there and clatters. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.



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