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09-08-2007, 12:30 PM
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#1 |
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Registered User
Join Date: Sep 2005
Location: Charleston, South Carolina
Posts: 285
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Help needed......!
Just had the gas tank dropped, cleaned and replaced. The sending unit worked perfectly before and now reads WAAAY past full. The needle will move a little when the ignition is turned on, but its still squirrely.
If someone can post some info I'd 'preciate it. By the way, I tried search, but it isnt working.......Thanks. SLIMJIM
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1970 Chevrolet Blazer 2 wheel drive - SOLD Last edited by SLIMJIM; 09-08-2007 at 12:32 PM. |
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09-08-2007, 12:33 PM
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#2 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: Help needed......!
Make sure your tank is grounded.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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09-08-2007, 12:37 PM
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#3 |
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Registered User
Join Date: Sep 2005
Location: Charleston, South Carolina
Posts: 285
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Re: Help needed......!
Thanks jhow. I had a shop do this for me because of not having another person to help me. They said they hooked it ll back up, but....you never know. I will mention it when I take it in monday. Thanks again.
SLIMJIM
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1970 Chevrolet Blazer 2 wheel drive - SOLD |
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09-09-2007, 12:38 PM
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#4 |
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Senior Member
Join Date: Mar 2007
Location: VANCOUVER ISLAND, B.C., Canada
Posts: 1,602
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Re: Help needed......!
I would also look at the sending unit as the possible fault. On the unit there is a small flat lenfth of wire that can become corroded and cause the gauge to swing to the right to the bottom of the gauge. I changed my sender unit in my 70' and cured the problem.
esll. 
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Tomorrow is for doing today's stuff.  ************************************* This truck has just the right amount of energy for me! Author: Warren Lake .... (member) Last edited by EAST SIDE LOW LIFE; 09-10-2007 at 10:26 AM. |
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09-09-2007, 03:09 PM
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#5 |
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Active Member
 
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Help needed......!
In your case, it could be the internal sending unit as Longhorn mentioned gone bad, could be the float arm jammed up at an odd angle, or the wire, or metal cap going to it shorted to ground. Check the rubber grommets, etc. on the sending unit. They can break with age when handled...
It may be time for a new one... Here's a site you can read. I believe it's the same for all year trucks. http://www.6066gmcguy.org/Electrical-02.htm |
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09-10-2007, 09:31 AM
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#6 |
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Senior Member
Join Date: Jan 2005
Location: Claremore, OK 74017
Posts: 2,639
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Re: Help needed......!
How much was the cleaning and do you know what they used?
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68 Short Stepside C-10 69 SWB C-10 70 Flatbed C-20 70 LWB C-20 BB402 70 LWB C-10 CST 70 LWB C-10 CST 71 Short Stepside Cheyenne C-10 72 LWB C-10 72 Blazer 4x4 4spd 95 Jeep Cherokee 4x4 |
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09-10-2007, 10:00 AM
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#7 |
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Registered User
Join Date: Jul 2000
Location: NC
Posts: 987
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Re: Help needed......!
I had exactly the same problem this past week. Following http://www.6066gmcguy.org/Electrical-02.htm, everything checked out. So, with the ignition switch in the ON position, I tapped the gauge and it dropped back down where it should be. I hope this solves my problem. Let me know if this works for you.
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