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C5 fuel level sending units......

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Old Dec 14, 2022 | 11:45 AM
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Default C5 fuel level sending units......

Hey, guys. Just wondering about replacement C5 fuel level sending units, specifically this:
Can you buy new sending units WITHOUT the fuel pump? All of them I've looked at have the pump, which I can't use due to engine mods on my LS7 EDIT: 2000 C5. Anyone know? Thanks in advance.....

Last edited by grinder11; Dec 16, 2022 at 10:56 AM.
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Old Dec 14, 2022 | 08:13 PM
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Originally Posted by grinder11
Hey, guys. Just wondering about replacement C5 fuel level sending units, specifically this:
Can you buy new sending units WITHOUT the fuel pump? All of them I've looked at have the pump, which I can't use due to engine mods on my LS7 C5. Anyone know? Thanks in advance.....
Well sort of...depending on the model year of your car....as example for a 2003, left/right available but for a 1999 only left available...
AC delco link ACDelco Online Catalog
Cheers,
Goose
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Old Dec 14, 2022 | 09:31 PM
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Are you replacing it because of inaccurate fuel readings? If so, have you tried multiple fuel treatments in your gas tank?
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Old Dec 14, 2022 | 09:47 PM
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Originally Posted by Vader_C5
Are you replacing it because of inaccurate fuel readings? If so, have you tried multiple fuel treatments in your gas tank?
This year it took me about 4-5 bottles every few months to get my typical 7/8 tank filled to finally read max F this weeks fillup. Adding about 1/2 tank with the 20 gal treatment Techron bottle.
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Old Dec 15, 2022 | 01:49 PM
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Originally Posted by Vader_C5
Are you replacing it because of inaccurate fuel readings? If so, have you tried multiple fuel treatments in your gas tank?
Yes, inaccurate readings. I've always had luck with Techron, but sooner or later, its not gonna work. Really need to know if the senders can be bought independently of the fuel pump.....
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Old Dec 15, 2022 | 05:46 PM
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How about it, guys? Anyone know? I just can't see laying out $600-$800 for a couple sending units, when I can't use the fuel pump.....
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Old Dec 15, 2022 | 06:35 PM
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What year 2000?

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Old Dec 15, 2022 | 07:03 PM
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Originally Posted by grinder11
How about it, guys? Anyone know? I just can't see laying out $600-$800 for a couple sending units, when I can't use the fuel pump.....
There are just the fuel level senders available, click on the AC delco link here>>>>> ACDelco Online Catalog
plug your car year info and search.
see my above post
cheers,
Goose
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Old Dec 15, 2022 | 07:13 PM
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Originally Posted by 69
There are just the fuel level senders available, click on the AC delco link here>>>>> ACDelco Online Catalog
plug your car year info and search.
see my above post
cheers,
Goose
That link only shows a part # not price or availability
Unless I missed that
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Old Dec 16, 2022 | 10:53 AM
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Originally Posted by Smoken1
What year 2000?
Yes, a 2000 model. Sorry, I should've listed that riight away ....
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Old Dec 16, 2022 | 05:08 PM
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I know someone from the FI (Actually c5modified on F/B) section that may have some left at 125 ea
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Old Dec 16, 2022 | 07:53 PM
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Originally Posted by grinder11
Yes, inaccurate readings. I've always had luck with Techron, but sooner or later, its not gonna work.
I've seen this happen. Techron helped with the gauge not showing full after a fillup, but I still see the right side sender dropping to zero when both tanks get below 1/2 full. This can be observed by the fuel level increasing after the siphon pump has moved most of the fuel from the right tank to the left. I've always used only top-tier 93 octane, and I'm tired of spending $ on additives.

I really wish GM would have revised these senders and replaced the silver with gold. This is the fourth 99-01 era vehicle I've owned (two were purchased new) that had this easter egg. All in the name of saving pennies.
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Old Dec 17, 2022 | 09:52 AM
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Try taking out your existing ones and clean the contacts with wet sandpaper and electronics cleaner spray. Other CF members have used this method and it works. Total cost: ~$10 (or free if you already have these handy).

"Finally removed the.passenger side fuel sending unit and cleaned the oxidizing and tarnished contacts and sweep contacts with very light wet dry sand paper and electric contact cleaner. Solved. Cheap fix considering the absurd price of a new unit if you can find one."

https://www.corvetteforum.com/forums...post1604763259

Last edited by SwanSongZ; Dec 17, 2022 at 10:04 AM.
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Old Dec 17, 2022 | 11:39 AM
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Mine would read off or would stay the same after i put 3 gallons of gas. I put techron 16oz i think fixed it. I wouldnt hesitate to use it again if i needed to.
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Old Dec 17, 2022 | 12:12 PM
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Thanks guys, but I still wish I knew whether new ones can be bought without the fuel pump. Last week, wife and I were 50 miles from home, in the country. Tank went from 3/8 full to empty in about 100 feet. When I filled it, it only took 12-13 gallons!! So, was final 5 or 6 gallons still available? IDK. I've used many bottles of Techron. Always worked......Until now!!
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Old Dec 17, 2022 | 12:17 PM
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You can buy new GM sending units from Rock Auto. WITHOUT THE PUMP. For use on either side in a early C5. They are like 50 bucks. Part Number is 88950663.

Beware that it is always listed as Left Hand only. Per the instructions this is NOT the case. It can be used on either side. The wiring and connector are the same and the way it connects or clips onto the hat is the same.


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Old Dec 17, 2022 | 01:18 PM
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Originally Posted by Mr. Black
You can buy new GM sending units from Rock Auto. WITHOUT THE PUMP. For use on either side in a early C5. They are like 50 bucks. Part Number is 88950663.

Beware that it is always listed as Left Hand only. Per the instructions this is NOT the case. It can be used on either side. The wiring and connector are the same and the way it connects or clips onto the hat is the same.
Yep, replaced my driver side one from the one at rock auto
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To C5 fuel level sending units......

Old Dec 17, 2022 | 02:09 PM
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Originally Posted by Mr. Black
You can buy new GM sending units from Rock Auto. WITHOUT THE PUMP. For use on either side in a early C5. They are like 50 bucks. Part Number is 88950663.

Beware that it is always listed as Left Hand only. Per the instructions this is NOT the case. It can be used on either side. The wiring and connector are the same and the way it connects or clips onto the hat is the same.
Thanks, Steve!! That's what I was looking for!!
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Old Dec 17, 2022 | 02:09 PM
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Originally Posted by 69GTO96Z
Yep, replaced my driver side one from the one at rock auto
Thank you to you, and everyone who replied!!!
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Old Dec 17, 2022 | 02:21 PM
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At Rock Auto, I'm finding part #19421094, Left, for $44.79. Different # than I was given, but says it's made for a 2000. Man, $44.79 is WAY less money than I've spent on Techron, let me tell you!!!
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