What is this? See picture - The 1947 - Present Chevrolet & GMC Truck Message Board Network

PHOENIX · 01-24-2005, 03:16 PM

I had to change the heater core this weekend and decided to remove this thing (on top). I left the one on the bottom there for now.
What are they?
I think they are related to the after market A/C system that was in this truck. I removed most of it as I come across it.
If anyone knows what these are please reply

PHOENIX · 01-25-2005, 01:02 PM

OK so nobody knows what these are

Can anyone confirm that these are not factory components?

60-66 Nut · 01-25-2005, 03:31 PM

I can't even look at the picture to give you an idea. All I get is a red X, when I click on it nothing happens. Or maybe even less than nothing. Is it something with my browser settings?

60-66 Nut

ocbaud · 01-25-2005, 03:43 PM

i've never seen that in my truck or any truck i've worked on stock

Prerunner1982 · 01-25-2005, 03:48 PM

60-66nut, it maybe your browser, i have viewed this thread a few times with no problem, to see it, right click over the pic, then go to properties, then where it says location...highlight the url (web address). Open another browser... past url into browser it should show up then..

Eddie, i have something similar on my firewall, but i believe it is the torque converter lock up. but it only has one vac. line, not 2.. disconnect it and see if anything happens. safe to say its useless... or you could disconnect the plug and hook a multimeter up to it and play with your A/C controls and see if something happens..

Jonboy · 01-25-2005, 03:50 PM

I have never seen them either, for what is's worth. I would bet it is to your aftermarket a/c.

PHOENIX · 01-25-2005, 05:49 PM

I removed it saturday and been driving the truck since.
Probably for the after market a/c system.
BTW that wire at the top on teh first picture is a ground to the firewall.
The vacuum line from the top actually hooked to the bottom part.
The bottom part controls the flap near the blower.
The other vacuum port on that top thing must have hooked up to the engine somewhere to get the vacuum.

ureckme · 01-25-2005, 09:45 PM

Its an electric vacume switch. A/C to close heater vent when A/c running. Matt

**smokinn** · 01-25-2005, 11:05 PM

Its a blue arrow used to point at things.

01-24-2005, 03:16 PM	#1
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	What is this? See picture I had to change the heater core this weekend and decided to remove this thing (on top). I left the one on the bottom there for now. What are they? I think they are related to the after market A/C system that was in this truck. I removed most of it as I come across it. If anyone knows what these are please reply __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

01-25-2005, 01:02 PM	#2
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	OK so nobody knows what these are Can anyone confirm that these are not factory components? __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

01-25-2005, 03:31 PM	#3
60-66 Nut Professional Beer Tester Join Date: Aug 2004 Location: Louisiana Posts: 453	I can't even look at the picture to give you an idea. All I get is a red X, when I click on it nothing happens. Or maybe even less than nothing. Is it something with my browser settings? 60-66 Nut __________________ 60 Ford F100 Custom Cab 61 Apache Short Fleetside 64 C10 Short Stepside 65 C80 409 V8 5spd(X-Firetruck) 83 GMC 350 Olds Diesel 85 GMC Short Bed 86 GMC Short Bed 90 GMC R3500 Crew Cab 92 GMC 1500

01-25-2005, 03:50 PM	#6
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	I have never seen them either, for what is's worth. I would bet it is to your aftermarket a/c. __________________ 1974 Jimmy- 5.3/4L80e/NP241

01-25-2005, 05:49 PM	#7
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	I removed it saturday and been driving the truck since. Probably for the after market a/c system. BTW that wire at the top on teh first picture is a ground to the firewall. The vacuum line from the top actually hooked to the bottom part. The bottom part controls the flap near the blower. The other vacuum port on that top thing must have hooked up to the engine somewhere to get the vacuum. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

01-25-2005, 03:43 PM	#4
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	i've never seen that in my truck or any truck i've worked on stock

01-25-2005, 03:48 PM	#5
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,906	60-66nut, it maybe your browser, i have viewed this thread a few times with no problem, to see it, right click over the pic, then go to properties, then where it says location...highlight the url (web address). Open another browser... past url into browser it should show up then.. Eddie, i have something similar on my firewall, but i believe it is the torque converter lock up. but it only has one vac. line, not 2.. disconnect it and see if anything happens. safe to say its useless... or you could disconnect the plug and hook a multimeter up to it and play with your A/C controls and see if something happens..

01-25-2005, 09:45 PM	#8
ureckme ureckmefixit2@cox.net Join Date: Dec 2004 Location: Mesa AZ. (Phoenix) Posts: 1,284	Its an electric vacume switch. A/C to close heater vent when A/c running. Matt

01-25-2005, 11:05 PM	#9
smokinn Senior Member Join Date: Aug 2002 Location: omaha,Ne Posts: 619	Its a blue arrow used to point at things.



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