Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Fuel gauge issue


Recommended Posts

Hello, I was wondering if someone could  please help me troubleshoot the issue with my fuel gauge in my 96 c/k1500 (454ss clone with 7.4l vortec). I replaced the fuel sending unit in the gas tank and that did nothing. Here is a video I posted on youtube of the issue. When I first turn ignition on the fuel gauge starts to move but then drops. I assume the gauge is physically okay and that its some type of electrical issue?

 

Thanks,

Sean

96' c/k1500 (454ss clone w/ 7.4l vortec)

Link to comment
Share on other sites

Per the haynes manual you can check a fuel sending unit with an ohmmeter when you remove it.  Watch the voltage change by physically moving the fuel float.  If its not smoothly changing then your sending unit is bad.

 

If it does report smooth changing voltage, then the problem is further up the connection to the dash.  The dash itself has a lot going on that might not be reflecting the incoming data appropriately.  
 

Does everything else otherwise function appropriately, like does it start and run or change fuel level as you drive?

 

It is possible the problem had nothing to do with your sending unit in the first place.  Test the other connections in the circuit and look for bad/open grounds, bad wires, blown fuses, etc

Edited by greatmizzou
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.