The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-25-2016, 06:52 PM   #1
kdml
Registered User
 
Join Date: Jan 2013
Location: Richmond, VT
Posts: 34
Tank Selector Switch Location

The aftermarket switch for my dual tanks finally broke. I bought a factory ac delco switch. Since my truck did not originally come with dual tanks, I am not sure where the factory mounted the selector switch. Can anyone provide a location? It's an '83 K20.

Thanks
Doug
kdml is offline   Reply With Quote
Old 08-25-2016, 08:40 PM   #2
Low69CST
Registered User
 
Join Date: May 2000
Location: Frankfort, Kentucky, USA
Posts: 2,163
Re: Tank Selector Switch Location

My 87 (fuel injected) is located just to the left of the ash tray. I can get a picture tomorrow.
__________________
'69 CST Short fleetside
Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress)
'87 V10 4x4 Short Fleetside
Quad Suspension and Dual Tanks
Low69CST is offline   Reply With Quote
Old 08-26-2016, 07:25 AM   #3
TexasJeff
Don't Crush em Restore em
 
TexasJeff's Avatar
 
Join Date: Aug 2004
Location: Pinehurst, Texas
Posts: 764
Re: Tank Selector Switch Location

Here is picture of mine, 1980.
__________________
TexasJeff
2009 Silver with Linen Interior Cadillac DTS
1990 Red with White Top and Interior Ford Mustang GT convertible
1998 Red with Gray Interior, C3500 Chevy Crew Cab Dually
TexasJeff is offline   Reply With Quote
Old 08-26-2016, 01:31 PM   #4
hatzie
Moderator
 
hatzie's Avatar
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,911
Re: Tank Selector Switch Location

The OEM rockers need a square hole.
If you have a truck that didn't come with the NL2 option I'd use a DPDT 1/2" diameter stem toggle switch. Toggle switches are cheap, more robust than the GM plastic rockers, don't need a big square hole, can be hidden anywhere you like, and can be bought cheap... between $5-$15.

A regular Six terminal DPDT switch can be easily wired as a polarity reversing switch for the Motorized valve.
DPDT Toggle Switch Two Position ON - ON... Six .250 Disconnect terminals

Polarity reversing "DC motor" toggle switches are only easily avaliable as three position "center off" switches.
Polarity Reversing Toggle Switch Three Position ON - OFF - ON... Four .250 Disconnect terminals

The Delphi Packard 56 Six Position unsealed connector shell # 12052978 is perfect for the above toggle switches.
Terminals Female Delphi Packard 56. Pick your wire gauge. http://www.mouser.com/Delphi-Connect...z0zlezZ1z0yy6b

BTW the motor reversing toggle switch can be subbed in place of the 81-91 rocker switches by slipping the terminals out of the square plug and into the six position angled terminal plug. The switch mounting is up to you... switching to the center OFF position makes a stealth fuel pump disable on the TBI trucks.
__________________
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...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.

Last edited by hatzie; 08-26-2016 at 01:40 PM.
hatzie is offline   Reply With Quote
Old 08-26-2016, 10:50 PM   #5
TKCR
Senior Member
 
TKCR's Avatar
 
Join Date: Oct 2014
Location: Ohio
Posts: 6,836
Re: Tank Selector Switch Location

Here's a few pics of mine, with the switch & just the hole ( without the switch ).
Mine's an 86
Attached Images
  
TKCR is offline   Reply With Quote
Old 08-27-2016, 04:57 PM   #6
tucsonjwt
Registered User
 
Join Date: Jul 2007
Location: Tucson, AZ
Posts: 3,188
Re: Tank Selector Switch Location

My 83 has the same location as TKCR. I just bought a replacement switch from NAPA for $15. The problem with these switches is that they are very fragile. There a 4 tiny plastic tabs which hold the face plate and toggle mechanism to the actual switch. I can't find any way to remove the switch from the dash without removing the dash pad. The air conditioning ductwork blocks the area behind the metal dash and prevents your hand from reaching up there.

My experience is that these switches fail about every 3 years. At least they are cheap to buy.

My 76 had a different type of switch. It was more of a positive snap feel to the toggle. The 83 switches I have been buying seem to have a springiness feel to the toggle.
tucsonjwt is offline   Reply With Quote
Old 08-28-2016, 08:15 AM   #7
kdml
Registered User
 
Join Date: Jan 2013
Location: Richmond, VT
Posts: 34
Re: Tank Selector Switch Location

Thanks all for the info. I already picked up a stock switch so I am going to try it out. I had an aftermarket toggle switch before and it was what broke

Doug
kdml is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 09:52 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com