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 1967 - 1972 Chevy/GMC Suburbans & Panels Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 06-03-2024, 05:55 PM   #1
68Gold/white
Registered User
 
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,385
1971 C-10 gas gauge ot working...

I helped a friend locate this 71 C10, around Covid time, March 2022.
It seemed like the gas gauge worked when he got it, but has seldom work for quite a while.
I had the sender out of it, recently. This is a California emissions pickup (350), sender has 3/8 and 1/4" pipes on it.
I tested the float movement with an ohm meter. That functioned fine.
Right after I reinstalled the sender it went to 1/8 tank reading, which was likely correct. Now it just reads a fuzz off the "E" mark. I put $35.00 gas in it a minute ago, gauge did not move....

I'm wondering what the common problem could be with these pickups, if there is one...
Gauge cluster is original, old...it is the 6 hole type.

Thanks!!!
68Gold/white is offline   Reply With Quote
Old 06-03-2024, 09:31 PM   #2
LockDoc
The Older Generation


 
LockDoc's Avatar
 
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,629
Re: 1971 C-10 gas gauge ot working...

Quote:
Originally Posted by 68Gold/white View Post
I helped a friend locate this 71 C10, around Covid time, March 2022.
It seemed like the gas gauge worked when he got it, but has seldom work for quite a while.
I had the sender out of it, recently. This is a California emissions pickup (350), sender has 3/8 and 1/4" pipes on it.
I tested the float movement with an ohm meter. That functioned fine.
Right after I reinstalled the sender it went to 1/8 tank reading, which was likely correct. Now it just reads a fuzz off the "E" mark. I put $35.00 gas in it a minute ago, gauge did not move....

I'm wondering what the common problem could be with these pickups, if there is one...
Gauge cluster is original, old...it is the 6 hole type.

Thanks!!!
Did you try hooking up a ground wire from the sender tube to the body? A piece of wire with alligator clips on each end would work.
.
__________________
Leon

Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles

(My Dually Pickup Project Thread)

http://67-72chevytrucks.com/vboard/s...d.php?t=829820

-
LockDoc is offline   Reply With Quote
Old 06-04-2024, 08:00 AM   #3
1970cstblazer
All stock and staying that way
 
1970cstblazer's Avatar
 
Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,655
Lightbulb Re: 1971 C-10 gas gauge ot working...

The float itself will fail.
__________________
1970 K/5 Blazer CST 4WD, Medium Bronze, 93k ACT. miles, 350, 4 speed, rear positraction, 16.5" x 8.25" HD wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration finally getting close to completion..

1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor...

2017 Sierra 1500 SLT 4WD, Black, 45k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2...

2019 Canyon SLT 4WD, White, 62k miles, 3.6, 8L45, 3.23 LS, 18" wheels
1970cstblazer is offline   Reply With Quote
Old 06-04-2024, 02:59 PM   #4
HO455
Post Whore
 
HO455's Avatar
 
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,267
Re: 1971 C-10 gas gauge ot working...

Here is a link to Tbone1964's great troubleshooting guide for fuel guages. The guages are pretty trouble free but they are 50 plus years old so they might just need some love.

https://67-72chevytrucks.com/vboard/...d.php?t=640615
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
HO455 is offline   Reply With Quote
Old 06-04-2024, 04:33 PM   #5
68Gold/white
Registered User
 
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,385
Re: 1971 C-10 gas gauge ot working...

Thanks, all.
My next stab at working on his pickup will be in a couple of weeks.
Jeff
68Gold/white is offline   Reply With Quote
Old 06-05-2024, 07:42 AM   #6
1970cstblazer
All stock and staying that way
 
1970cstblazer's Avatar
 
Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,655
Wink Re: 1971 C-10 gas gauge ot working...

An extreme example of what can happen to the 50 plus year old brass fuel sender floats:


__________________
1970 K/5 Blazer CST 4WD, Medium Bronze, 93k ACT. miles, 350, 4 speed, rear positraction, 16.5" x 8.25" HD wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration finally getting close to completion..

1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor...

2017 Sierra 1500 SLT 4WD, Black, 45k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2...

2019 Canyon SLT 4WD, White, 62k miles, 3.6, 8L45, 3.23 LS, 18" wheels
1970cstblazer is offline   Reply With Quote
Reply

Bookmarks


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 06:00 PM.


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