Click on image for the lowdown. 
====
| | |
8 members (Gdads51, frogfarmer, Bill Hanlon, LAROKE, gswbbc, Forty9, 48jim1ton, Hotrod Lincoln),
107
guests, and
0
robots. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,043 Posts1,055,540 Members48,425 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Aug 2009 Posts: 50 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2009 Posts: 50 | hey guys, i was wondering how accurate is your fuel gauge and how much does it bounce around? I just put a new sending unit in and filled up the tank(behind the seat). The gauge is at 5/8ish and bounces around a bit. the new sending unit had 90omhs stamped on it.
second question, on my dash, there is what looks like two warning lights. one above the ignition switch the other above the wiper switch. they do not light up. what do they do?
truck is a 65 chev c20 with gauges in the cluster.....
thanks. | | | | | Joined: Oct 2008 Posts: 321 'Bolter | | 'Bolter Joined: Oct 2008 Posts: 321 | First off, that is the wrong sending unit for the stock fuel guage. The stock guage requires a 30 ohm sending unit. Now, as to the bouncing, that is pretty typical. Some are worse than others, but any truck that is still using the original fuel tank will slosh around pretty good. My '71 bounces pretty good. As to accuracy, it varies depending on the condition of the guage and the sending unit. My '71 is pretty accurate while my '63 C20 is off by about 1/4 tank.
As to the warning lights, I am not 100% sure on the '65, but I know that the '63's have a similar red lense setup and on those one is for an overspeed indicator and another is for a tandem lock. You have to remember that the guage clusters in the pickups and big trucks were the same just some stuff left off on the pickups, like the tandem lock indicators. I am assuming that is the case on your '65, anyway.
1963 Chevy C20 Longbed Stepside
1978 Chevy K30 Custom Deluxe
| | | | | Joined: Mar 2006 Posts: 72 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2006 Posts: 72 | I've owned a few 65s and the gas gauge needle on all bounced pretty good.
I'm not sure exactly which lights on the dash you're referring to though. | | | | | Joined: Mar 2009 Posts: 788 'Bolter | | 'Bolter Joined: Mar 2009 Posts: 788 | more than likely the h/beam indicator light and the amp meter light
ron | | | | | Joined: Nov 2008 Posts: 98 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2008 Posts: 98 | Bear is correct about the indicator lights...hold a flashlight behind the dash and they will light up. | | | | | Joined: Aug 2009 Posts: 50 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2009 Posts: 50 | thanks guys. Im confused. today i drove the truck to work and the fuel gauge stayed at full. which is right as i filled it up last night. On the drive home, it was at about 3/4's and would go to full when i made left turns and to 1/2 when i made right turns. **edit** I live 10km from work, or a 10min drive.
I will call the parts store and ask about a 30ohm sender.
Thanks again
Last edited by trevota; 08/28/2009 3:07 AM.
| | | | | Joined: Mar 2009 Posts: 788 'Bolter | | 'Bolter Joined: Mar 2009 Posts: 788 | I think that the 90 ohm came in, in 66; prior to that they were 30 ohm. if you can't get a 30 ohm ter are a few fellows around that can modify yours to 30 ohms
ron | | | | | Joined: Aug 2009 Posts: 50 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2009 Posts: 50 | yup you guys were right, one says tandem lock the other says overspeed. | | |
|
|
