Sending unit. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

orange72350 · 01-24-2003, 12:33 AM

my 72's gas gauge wasnt working when i bought the truck, so i sent it 2 the shop fer da inspection, and had them look. the mechanic said i needs a new sending unit, so i get a new one, stuff it in, and voila, it doesnt work right. the gauge, even when the tank is stuffed full, sticks right at 1/4 tank. the gauge satys there until the level in the tank is down past 1/4, and its functions normally past there till empty. i ripped the tank apart again, and found that the sending unit float is definelty not hung up on anything. so, what gives? anybody got ideas?

GMC_Aaron · 01-24-2003, 12:51 AM

I just recently had the same, identical problem. I just went ahead and got new, everything. I replaced the sending unit first, then the wiring and then the gauge. It was the gauge. I originally got the gauge from LMC and I still had the problem. It was only reading 1/4 tank. I sent it back and got one from Brothers here in SoCal and it worked perfectly. I just decided to replace everything because you never know with these trucks. You'll buy one new part, but everything else attatched to it is still going to be 33 years old. If you have the sending unit out, hook it all up as if it was inside and move it up and down. It's easier this way because you don't have to keep taking the sending unit out. Let me know if you have any other problems.

orange72350 · 01-24-2003, 01:16 AM

thanx man,. what was the new gauge through brothers worth? i have a tuckers classics catalog in front of me, and the price is about 40$. if the brothers is cheaper, could ya let me know. gotta save every penny possible.thanx

dale

Longhorn Man · 01-24-2003, 01:47 AM

If you are pinching pennys, I am looking at one right now in my desk drawer that i can send you for 15 bucks. It's 30 years old, but I know for a fact it works.

orange72350 · 01-24-2003, 01:55 AM

hey, what kind of payment options u got? if u know fer sure it works, ill try and take it off yer hands.

Longhorn Man · 01-24-2003, 02:00 AM

snail mail payment...I have no pay pal nor access.
You'll be getting an IM here in a moment

GMC_Aaron · 01-24-2003, 10:48 AM

The Brothers gauge was about $70, but I needed it right away, so I was willing to spend that much. I was going on a 6 hour trip and I needed one before I left in 2 days. I was really depending on the gauge I got from LMC. The gauge from LMC wasn't factory spec. because the directions it came with stated that I didn't need to use the resistor that is found on the back of the factory gauge I already had. I thought that was weird. It must have been built in. I try to put factory parts/accessories on my truck. I have had some bad luck with LMC. Luckily there are about 5 good shops here in SoCal that specialize in these trucks.

Longhorn Man · 01-24-2003, 02:30 PM

It is pretty interesting makin a road trip with no guages...My ols Longhorn had no speedo nor fuel guage. I had to go from Cetral Tx up here to Cen Ohio once...interesting trip too.
I watched the mile markers real close, kept notes of the miles driven when ever I got onto another highway or into a new state, (since the numbers would chainge) and I carried a 5 gall can of gas in the back...got lucky and never had to use it.
Never ran out while delivering pizzas in it either, but that was more like luck than anything. Came close a few times.

01-24-2003, 12:33 AM	#1
orange72350 Registered User Join Date: Jan 2003 Location: Cold, Snowy High Level, Alberta Canada Eh Posts: 394	Sending unit. my 72's gas gauge wasnt working when i bought the truck, so i sent it 2 the shop fer da inspection, and had them look. the mechanic said i needs a new sending unit, so i get a new one, stuff it in, and voila, it doesnt work right. the gauge, even when the tank is stuffed full, sticks right at 1/4 tank. the gauge satys there until the level in the tank is down past 1/4, and its functions normally past there till empty. i ripped the tank apart again, and found that the sending unit float is definelty not hung up on anything. so, what gives? anybody got ideas? __________________ 2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!""

01-24-2003, 12:51 AM	#2
GMC_Aaron Registered User Join Date: Jul 2002 Location: Ventura, Ca. Posts: 87	I just recently had the same, identical problem. I just went ahead and got new, everything. I replaced the sending unit first, then the wiring and then the gauge. It was the gauge. I originally got the gauge from LMC and I still had the problem. It was only reading 1/4 tank. I sent it back and got one from Brothers here in SoCal and it worked perfectly. I just decided to replace everything because you never know with these trucks. You'll buy one new part, but everything else attatched to it is still going to be 33 years old. If you have the sending unit out, hook it all up as if it was inside and move it up and down. It's easier this way because you don't have to keep taking the sending unit out. Let me know if you have any other problems. __________________ Aaron Ventura, Ca. 1972 GMC Super Custom SB350/TH400

01-24-2003, 01:16 AM	#3
orange72350 Registered User Join Date: Jan 2003 Location: Cold, Snowy High Level, Alberta Canada Eh Posts: 394	thanx man,. what was the new gauge through brothers worth? i have a tuckers classics catalog in front of me, and the price is about 40$. if the brothers is cheaper, could ya let me know. gotta save every penny possible.thanx dale __________________ 2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!""

01-24-2003, 01:55 AM	#5
orange72350 Registered User Join Date: Jan 2003 Location: Cold, Snowy High Level, Alberta Canada Eh Posts: 394	hey, what kind of payment options u got? if u know fer sure it works, ill try and take it off yer hands. __________________ 2003 yamaha raptor. Stock, but it still hauls!!!! 2000 skiddo mxz 700. Camoplast 1.5 inch track, jaws twin pipes, b+b can, custom built and weighted clutch, wiseco piston, high comp heads. its very fast. wow. 72 c-10 longbox. Bright Orange. Brand new 350, rv cam, performer intake, qjet, headers, 2 1/2 inch exhaust into hooker areo chamber mufflers. Body work coming soon. "dont let yer mind wander, its to little to go places by itself." "Forget the herse, cause i'll never die"-ACDC Back In Black "If It's To Loud, Yer Just Too Old" "I Love Anything Fast Enough To Do Something Stupid In" "Instant idiot, just add beer!!""

01-24-2003, 10:48 AM	#7
GMC_Aaron Registered User Join Date: Jul 2002 Location: Ventura, Ca. Posts: 87	The Brothers gauge was about $70, but I needed it right away, so I was willing to spend that much. I was going on a 6 hour trip and I needed one before I left in 2 days. I was really depending on the gauge I got from LMC. The gauge from LMC wasn't factory spec. because the directions it came with stated that I didn't need to use the resistor that is found on the back of the factory gauge I already had. I thought that was weird. It must have been built in. I try to put factory parts/accessories on my truck. I have had some bad luck with LMC. Luckily there are about 5 good shops here in SoCal that specialize in these trucks. __________________ Aaron Ventura, Ca. 1972 GMC Super Custom SB350/TH400

01-24-2003, 01:47 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	If you are pinching pennys, I am looking at one right now in my desk drawer that i can send you for 15 bucks. It's 30 years old, but I know for a fact it works.

01-24-2003, 02:00 AM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	snail mail payment...I have no pay pal nor access. You'll be getting an IM here in a moment

01-24-2003, 02:30 PM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	It is pretty interesting makin a road trip with no guages...My ols Longhorn had no speedo nor fuel guage. I had to go from Cetral Tx up here to Cen Ohio once...interesting trip too. I watched the mile markers real close, kept notes of the miles driven when ever I got onto another highway or into a new state, (since the numbers would chainge) and I carried a 5 gall can of gas in the back...got lucky and never had to use it. Never ran out while delivering pizzas in it either, but that was more like luck than anything. Came close a few times.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.