What does this button do? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

youngbuck · 12-30-2012, 07:54 PM

I got a 1970 c20 custom camper and was wondering what the little silver button beside the parking brake release does or should do. Anybody know?

**Stocker** · 12-30-2012, 08:04 PM

Doesn't sound stock.... might have to trace wires to see what it goes to.

*Mister-B* · 12-30-2012, 08:04 PM

Quote:

Originally Posted by youngbuck

I got a 1970 c20 custom camper and was wondering what the little silver button beside the parking brake release does or should do. Anybody know?

It may be a button to switch between the main gas tank and the auxiliary tank
Posted via Mobile Device

Orange Crate · 12-30-2012, 08:11 PM

That is what mine does. It is not a button it is a turning switch, to the left is my main tank and to the right the aux.

SS Tim · 12-30-2012, 08:29 PM

Pictures are always helpful.

bobs409 · 12-30-2012, 09:55 PM

WHAT EVER YOU DO, DON'T PUSH IT!!!

Survivalist45 · 12-30-2012, 10:02 PM

nevermind

**jocko** · 12-30-2012, 10:59 PM

Never mind what? Anyhoo....

If it is next to the parking brake handle, I don't believe it's original.

If it is just above where the driver's side a/c vent would be on the open space sheet metal, it is likely a factory fuel gauge switch (switches between main and aux tank fuel level to be displayed on the gauge). The fuel selector valve is normally on the driver's side floor, just inside the sill near the seat adjust lever.

Yes, a pic would be most excellent.

Shown are the gauge selector switch (pic 1) and fuel tank selector switch (pic 2) (note - the factory gauge selector was not a toggle, it was a rotary knob, just shown for location's sake...):

If it's a factory setup, you should have an NL2 code on the SPID (and both of the below switches).

Survivalist45 · 12-30-2012, 11:08 PM

I typed something without thinking, my brain automaticlly went to people I know never seeing my high beam switch before, and I typed that, so I had to delete it.

**Stocker** · 12-30-2012, 11:08 PM

Quote:

Originally Posted by Survivalist45

nevermind

Glad you figured it out......... now tell us what it is!

please

**jocko** · 12-30-2012, 11:12 PM

Quote:

Originally Posted by Survivalist45

I typed something without thinking, my brain automaticlly went to people I know never seeing my high beam switch before, and I typed that, so I had to delete it.

HA - was wondering what happened there....

no worries

bobs409 · 12-31-2012, 08:00 AM

More than likely it's just a switch some previous owner put there. That area seems to be the first place they drill holes for switches. I see it all the time in junkyard trucks.

In fact, I have a hole in one of my trucks I still have to weld shut!

alsriv2 · 12-31-2012, 12:40 PM

Passenger Ejection Seat activiation?

Sorry....my old B52 Air Force days coming back to life....

youngbuck · 12-31-2012, 03:23 PM

I'll get a pic up soon.
Posted via Mobile Device

youngbuck · 12-31-2012, 03:31 PM

I followed the wire and it goes to the temp. gauge
Posted via Mobile Device

**Stocker** · 12-31-2012, 03:42 PM

Odd -- is there another wire from that button? If so, where does it go? I'm trying to think of a reason for a button to be wired to a temp gauge.... It's kinda like the PO was either using that gauge for something else entirely, or wired it to monitor two different functions (selectable with the button).

JointTech · 12-31-2012, 04:51 PM

http://youtu.be/sVkhqf4Dxx4

**adzints7** · 11-14-2016, 11:58 PM

I know, it's an old thread. But I have this button and I am wondering if anyone else has seen this as well. No clue what it does...

**dmjlambert** · 11-15-2016, 12:46 AM

What is the button wired to? Let's see a picture.

**StingRay** · 11-15-2016, 09:11 AM

My bet is it engages the flux capacitor.

coopdog · 11-15-2016, 09:46 AM

^
^
^ I'll second that doc

toolboxchev · 11-15-2016, 11:30 AM

Quote:

Originally Posted by StingRay

My bet is it engages the flux capacitor.

Its the IGNITOR! Give it a whirl sometime you'll like it, Mikey does

**jeffahart** · 11-15-2016, 11:49 AM

Quote:

Originally Posted by adzints7

I know, it's an old thread. But I have this button and I am wondering if anyone else has seen this as well. No clue what it does...

Don't push that button! In case you wonder why you haven't heard back about this button from the OP... It's an ejection button.... he pushed it! Ejected him to the next county over.

Careful... don't push that button!

zosoppp · 11-15-2016, 01:58 PM

Elmer Fudd: I think I'll push this wed one.

Daffy Duck: No! No! No! No! No! Not the wed one! Don't ever push the wed one!

http://www.imdb.com/title/tt0046902/...item=qt0531443

**adzints7** · 11-16-2016, 02:36 AM

Despite the risks of time travel, ejection or maiming, I pushed the button. Once while parked, killed the engine. Once while driving. I held it down, pumped the accelerator and released hoping it would make an extremely loud noise and catapult me into 2017. Engine died and it was really tough to start after. I am not pushing that button anymore. Traced the wire but it gets lost behind the cowl. It is wrapped up with a couple others so I will sort it out when I have some more time. Thanks for the entertaining responses.

12-30-2012, 07:54 PM	#1
youngbuck Registered User Join Date: Dec 2012 Location: Flowery Branch, GA Posts: 18	What does this button do? I got a 1970 c20 custom camper and was wondering what the little silver button beside the parking brake release does or should do. Anybody know?

12-30-2012, 08:04 PM	#2
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,694	Re: What does this button do? Doesn't sound stock.... might have to trace wires to see what it goes to. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

12-30-2012, 08:11 PM	#4
Orange Crate Registered User Join Date: Feb 2011 Location: Under the Truck Dreaming Posts: 724	Re: What does this button do? That is what mine does. It is not a button it is a turning switch, to the left is my main tank and to the right the aux. __________________ 72 K20 Custom Camper, D60, 14BFF, full roller 406 TPI w custom built ECU and yes..it has tow hooks...

12-30-2012, 08:29 PM	#5
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: What does this button do? Pictures are always helpful. __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban

12-30-2012, 09:55 PM	#6
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	Re: What does this button do? WHAT EVER YOU DO, DON'T PUSH IT!!! __________________ Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10

12-30-2012, 10:02 PM	#7
Survivalist45 Registered User Join Date: Aug 2012 Location: Powhatan VA Posts: 30	Re: What does this button do? nevermind __________________ -CJ- 69 GMC stepside 350 370HP TH350 4:11's 8MPG and proud! Last edited by Survivalist45; 12-30-2012 at 10:02 PM. Reason: Actually thought about it

12-30-2012, 10:59 PM	#8
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,976	Re: What does this button do? Never mind what? Anyhoo.... If it is next to the parking brake handle, I don't believe it's original. If it is just above where the driver's side a/c vent would be on the open space sheet metal, it is likely a factory fuel gauge switch (switches between main and aux tank fuel level to be displayed on the gauge). The fuel selector valve is normally on the driver's side floor, just inside the sill near the seat adjust lever. Yes, a pic would be most excellent. Shown are the gauge selector switch (pic 1) and fuel tank selector switch (pic 2) (note - the factory gauge selector was not a toggle, it was a rotary knob, just shown for location's sake...): If it's a factory setup, you should have an NL2 code on the SPID (and both of the below switches). Attached Images Last edited by jocko; 12-30-2012 at 11:08 PM.

12-30-2012, 11:08 PM	#9
Survivalist45 Registered User Join Date: Aug 2012 Location: Powhatan VA Posts: 30	Re: What does this button do? I typed something without thinking, my brain automaticlly went to people I know never seeing my high beam switch before, and I typed that, so I had to delete it. __________________ -CJ- 69 GMC stepside 350 370HP TH350 4:11's 8MPG and proud!

12-31-2012, 08:00 AM	#12
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	Re: What does this button do? More than likely it's just a switch some previous owner put there. That area seems to be the first place they drill holes for switches. I see it all the time in junkyard trucks. In fact, I have a hole in one of my trucks I still have to weld shut! __________________ Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10

12-31-2012, 12:40 PM	#13
alsriv2 Registered User Join Date: Sep 2010 Location: Formerly MD and San Diego, now loving life in Arizona Posts: 1,636	Re: What does this button do? Passenger Ejection Seat activiation? Sorry....my old B52 Air Force days coming back to life.... __________________ Alan 2012 Ram 3500 Dually Crew Cab 6.7 Cummins 2014 Palomino Columbus 340RK 5th wheel '69 Chevy C10 396BB

12-31-2012, 03:23 PM	#14
youngbuck Registered User Join Date: Dec 2012 Location: Flowery Branch, GA Posts: 18	Re: What does this button do? I'll get a pic up soon. Posted via Mobile Device

12-31-2012, 03:31 PM	#15
youngbuck Registered User Join Date: Dec 2012 Location: Flowery Branch, GA Posts: 18	Re: What does this button do? I followed the wire and it goes to the temp. gauge Posted via Mobile Device Attached Images

12-31-2012, 03:42 PM	#16
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,694	Re: What does this button do? Odd -- is there another wire from that button? If so, where does it go? I'm trying to think of a reason for a button to be wired to a temp gauge.... It's kinda like the PO was either using that gauge for something else entirely, or wired it to monitor two different functions (selectable with the button). __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

12-31-2012, 04:51 PM	#17
JointTech Registered User Join Date: Feb 2012 Location: Mission Viejo, CA Posts: 1,856	Re: What does this button do? http://youtu.be/sVkhqf4Dxx4 __________________ 72 C20 Long Bed SB350 TH400 14 bolt rear end Extremely boring build thread

11-14-2016, 11:58 PM	#18
adzints7 Junior Member Join Date: Mar 2015 Location: San Clemente, CA Posts: 88	Re: What does this button do? I know, it's an old thread. But I have this button and I am wondering if anyone else has seen this as well. No clue what it does...



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11-15-2016, 12:46 AM	#19
dmjlambert Senior Member Join Date: Apr 2016 Location: Cypress, TX Posts: 3,814	Re: What does this button do? What is the button wired to? Let's see a picture.

11-15-2016, 09:11 AM	#20
StingRay Senior Member Join Date: Mar 2000 Location: Saskatoon,SK,Canada Posts: 2,476	Re: What does this button do? My bet is it engages the flux capacitor. __________________ Saskatoon, Saskatchewan Canada

11-15-2016, 09:46 AM	#21
coopdog Registered User Join Date: Nov 2012 Location: NYC Posts: 429	Re: What does this button do? ^ ^ ^ I'll second that doc __________________ .................._____ __________//___{\____ /__---____//____/__---/ .....(O). ..................(O). BUILD THREAD K20 http://67-72chevytrucks.com/vboard/s...d.php?t=651601 pages 2-4

11-15-2016, 01:58 PM	#24
zosoppp Registered User Join Date: Mar 2014 Location: Lincoln Park, NJ Posts: 189	Re: What does this button do? Elmer Fudd: I think I'll push this wed one. Daffy Duck: No! No! No! No! No! Not the wed one! Don't ever push the wed one! http://www.imdb.com/title/tt0046902/...item=qt0531443 __________________ 1970 C10 LWB 350SBC, SM330 Muncie (not saginaw SM326) (on tree), 3.07 open (assumed), PS, PB, Idiot lights

11-16-2016, 02:36 AM	#25
adzints7 Junior Member Join Date: Mar 2015 Location: San Clemente, CA Posts: 88	Re: What does this button do? Despite the risks of time travel, ejection or maiming, I pushed the button. Once while parked, killed the engine. Once while driving. I held it down, pumped the accelerator and released hoping it would make an extremely loud noise and catapult me into 2017. Engine died and it was really tough to start after. I am not pushing that button anymore. Traced the wire but it gets lost behind the cowl. It is wrapped up with a couple others so I will sort it out when I have some more time. Thanks for the entertaining responses. Attached Images

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