Gas tank sending unit - The 1947 - Present Chevrolet & GMC Truck Message Board Network

scubasteve16 · 10-19-2010, 10:43 PM

Ok PO installed what I believe is a Blazer gas tank in my 64 Chevy Panel. I have a aftermarket fuel gauge that requires a 0-90 ohm fuel sending unit. The sending unit in the tank now is only a 30 ohm sending unit. I have tried to go to local parts stores to find a sending unit but they look at me like I am a idiot. I found a few units that have a 0-90 ohm but they are for a larger tank so thay are to big. The tank I have is what I believe is a 15 gallon or so because it was completely full and I drained 3 five gallon gas cans of fuel out of it. Any info on a fuel sending unit that will work would be great. It has to be a sending unit that has not only the sending unit wiring on it but the fuel line on it.

'63GENIII · 10-19-2010, 11:28 PM

I'm not sure what vehicle you could pull one out of, but I recently installed a 90 ohm tank and am using the 30 ohm gauge. The tank that I used was out of a 91 Blazer. I removed 2/3 of the resistor wire for a total of 30 ohms left, rewound it and reinstalled it. It works great. That said, this stuff is not rocket science. You could probably get a sender out of a 91 and adapt it to your float - pickup combination. I looked around and found a guy in NY that said he could help me out for 200.00. I'm pretty cheap so I tried it myself. My tank was a 33 gall. I believe but they all work on the same principal.

**Captainfab** · 10-20-2010, 12:37 AM

Without seeing the tank, it's hard to make a recommendation, but try one for a '69-'72 Blazer. One of the aftermarket truck parts suppliers would be your best bet. If that gas tank has a half round indentation for a spare tire, it is the original tank. The Blazer sending unit will work.

gulffishin · 10-20-2010, 11:35 AM

If it were me, I would buy an aftermarket 0-90 ohm sending unit ( I think autometer makes one) and install it next to the 0-30 ohm unit. Leave the fuel pickup line hooked to the 0-30 unit and hook your gauge to the 0-90.
Posted via Mobile Device

scubasteve16 · 10-20-2010, 07:10 PM

Well I gave Brotherstruckparts.com a call and they have a sending unit that will go right in my tank and is 90 ohm for 35 bucks shipped to my dorr so guess i got my answer just had to do a little research.

scubasteve16 · 10-26-2010, 07:32 PM

Well looks like I am back on the hunt for a sending unit..... I spoke with a guy at Brothers and he told me the part number for the sending unit I needed and asured me they were in stock and I would have no worries I got online ordered it and few other things.... Got my order conformation and what do I see....Everythings in stock Except the one thing I need right now the sending unit.....So guess I wont be doing NO BUSINESS with Brothers in the future I am done with them...

lucifer · 10-26-2010, 08:00 PM

LMC sells one for the Blazer conversion tank I they have them in stock. Spoke with them today on that exact subject.

Lucifer

scubasteve16 · 10-26-2010, 09:29 PM

Ya I called and spoke with them about one I am needing a 90 ohm sending unit and they couldnt tell me if theres was a 90 ohm or a 30 ohm sending unit.

LostMy65 · 01-25-2011, 02:02 AM

I'm trying to figure out what ohms my sending unit needs to be for this gauge:
http://www.summitracing.com/parts/SUN-CP8209/

**Captainfab** · 01-25-2011, 03:03 AM

The description says that gauge is a 240 to 33 ohms fuel gauge.

Quote:

Originally Posted by LostMy65

I'm trying to figure out what ohms my sending unit needs to be for this gauge:
http://www.summitracing.com/parts/SUN-CP8209/

LostMy65 · 01-25-2011, 03:05 AM

Quote:

Originally Posted by Captainfab

The description says that gauge is a 240 to 33 ohms fuel gauge.

So does that mean it will work with any sending unit between 33 and 240 ohms?

**Captainfab** · 01-25-2011, 03:09 AM

No. That means that you will need a sending unit that reads 240 ohms when empty and 33 ohms when full. That's not a GM gauge/sending unit. I don't remember which OEM uses that one. You can get aftermarket sending units with that ohms range.

Quote:

Originally Posted by LostMy65

So does that mean it will work with any sending unit between 33 and 240 ohms?

LostMy65 · 01-25-2011, 03:12 AM

Okay, Thanks.
For now, my gas tank dipstick still works - aka: stick

10-19-2010, 10:43 PM	#1
scubasteve16 Registered User Join Date: Sep 2010 Location: Abilene Kansas Posts: 78	Gas tank sending unit Ok PO installed what I believe is a Blazer gas tank in my 64 Chevy Panel. I have a aftermarket fuel gauge that requires a 0-90 ohm fuel sending unit. The sending unit in the tank now is only a 30 ohm sending unit. I have tried to go to local parts stores to find a sending unit but they look at me like I am a idiot. I found a few units that have a 0-90 ohm but they are for a larger tank so thay are to big. The tank I have is what I believe is a 15 gallon or so because it was completely full and I drained 3 five gallon gas cans of fuel out of it. Any info on a fuel sending unit that will work would be great. It has to be a sending unit that has not only the sending unit wiring on it but the fuel line on it. __________________ "If it throws you back in the seat when it shifts, it was slowing down before it shifted" Disturbed Customs 1992 Chevy 1/2 ton 4x4 wore out 350 1975 Chevy 3/4 ton 4x4/ 8" suspension lift/ 468 Big Block/ 4 speed/ 4.56 gears/ 17' American Racing simulated beadlocks with Pro Comp 37x12.50 tires 1950 Pontiac Chieftain Straight 8/Hydromatic tranny

10-19-2010, 11:28 PM	#2
'63GENIII Registered User Join Date: Sep 2008 Location: San Carlos, Ca. Posts: 3,048	Re: Gas tank sending unit I'm not sure what vehicle you could pull one out of, but I recently installed a 90 ohm tank and am using the 30 ohm gauge. The tank that I used was out of a 91 Blazer. I removed 2/3 of the resistor wire for a total of 30 ohms left, rewound it and reinstalled it. It works great. That said, this stuff is not rocket science. You could probably get a sender out of a 91 and adapt it to your float - pickup combination. I looked around and found a guy in NY that said he could help me out for 200.00. I'm pretty cheap so I tried it myself. My tank was a 33 gall. I believe but they all work on the same principal. __________________ Chris '63 k15 long step Vortec 7.4 - L29 Blackbear tune, Five 0 Motorsports injectors, Chris Straub Cam, NV4500, divorced 205 52" front and 63" rear spring swap D44 / 14bff - disc axles Milemarker 9K and 10.5K hydraulic winches 63" & B52 Spring Install http://67-72chevytrucks.com/vboard/s...ng+swap+thread NV4500 Reverse Build Thread http://67-72chevytrucks.com/vboard/s...=reverse+build L29 - 7.4 Vortec Build http://67-72chevytrucks.com/vboard/s...&highlight=L29

10-20-2010, 12:37 AM	#3
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,247	Re: Gas tank sending unit Without seeing the tank, it's hard to make a recommendation, but try one for a '69-'72 Blazer. One of the aftermarket truck parts suppliers would be your best bet. If that gas tank has a half round indentation for a spare tire, it is the original tank. The Blazer sending unit will work. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

10-20-2010, 11:35 AM	#4
gulffishin Registered User Join Date: Jul 2010 Location: AL Posts: 180	Re: Gas tank sending unit If it were me, I would buy an aftermarket 0-90 ohm sending unit ( I think autometer makes one) and install it next to the 0-30 ohm unit. Leave the fuel pickup line hooked to the 0-30 unit and hook your gauge to the 0-90. Posted via Mobile Device

10-20-2010, 07:10 PM	#5
scubasteve16 Registered User Join Date: Sep 2010 Location: Abilene Kansas Posts: 78	Re: Gas tank sending unit Well I gave Brotherstruckparts.com a call and they have a sending unit that will go right in my tank and is 90 ohm for 35 bucks shipped to my dorr so guess i got my answer just had to do a little research. __________________ "If it throws you back in the seat when it shifts, it was slowing down before it shifted" Disturbed Customs 1992 Chevy 1/2 ton 4x4 wore out 350 1975 Chevy 3/4 ton 4x4/ 8" suspension lift/ 468 Big Block/ 4 speed/ 4.56 gears/ 17' American Racing simulated beadlocks with Pro Comp 37x12.50 tires 1950 Pontiac Chieftain Straight 8/Hydromatic tranny Last edited by scubasteve16; 10-20-2010 at 07:11 PM.

10-26-2010, 07:32 PM	#6
scubasteve16 Registered User Join Date: Sep 2010 Location: Abilene Kansas Posts: 78	Re: Gas tank sending unit Well looks like I am back on the hunt for a sending unit..... I spoke with a guy at Brothers and he told me the part number for the sending unit I needed and asured me they were in stock and I would have no worries I got online ordered it and few other things.... Got my order conformation and what do I see....Everythings in stock Except the one thing I need right now the sending unit.....So guess I wont be doing NO BUSINESS with Brothers in the future I am done with them... __________________ "If it throws you back in the seat when it shifts, it was slowing down before it shifted" Disturbed Customs 1992 Chevy 1/2 ton 4x4 wore out 350 1975 Chevy 3/4 ton 4x4/ 8" suspension lift/ 468 Big Block/ 4 speed/ 4.56 gears/ 17' American Racing simulated beadlocks with Pro Comp 37x12.50 tires 1950 Pontiac Chieftain Straight 8/Hydromatic tranny Last edited by scubasteve16; 10-26-2010 at 07:32 PM.

10-26-2010, 08:00 PM	#7
lucifer Registered User Join Date: Mar 2010 Location: simcoe ontario canada Posts: 681	Re: Gas tank sending unit LMC sells one for the Blazer conversion tank I they have them in stock. Spoke with them today on that exact subject. Lucifer __________________ 65 burb On the road Mar 26th Finally

10-26-2010, 09:29 PM	#8
scubasteve16 Registered User Join Date: Sep 2010 Location: Abilene Kansas Posts: 78	Re: Gas tank sending unit Ya I called and spoke with them about one I am needing a 90 ohm sending unit and they couldnt tell me if theres was a 90 ohm or a 30 ohm sending unit. __________________ "If it throws you back in the seat when it shifts, it was slowing down before it shifted" Disturbed Customs 1992 Chevy 1/2 ton 4x4 wore out 350 1975 Chevy 3/4 ton 4x4/ 8" suspension lift/ 468 Big Block/ 4 speed/ 4.56 gears/ 17' American Racing simulated beadlocks with Pro Comp 37x12.50 tires 1950 Pontiac Chieftain Straight 8/Hydromatic tranny

01-25-2011, 02:02 AM	#9
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,525	Re: Gas tank sending unit I'm trying to figure out what ohms my sending unit needs to be for this gauge: http://www.summitracing.com/parts/SUN-CP8209/ __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035

01-25-2011, 03:12 AM	#13
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,525	Re: Gas tank sending unit Okay, Thanks. For now, my gas tank dipstick still works - aka: stick __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035 Last edited by LostMy65; 01-25-2011 at 03:14 AM.

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