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Fuel gauge still not working?

Tiny
CASTAWAY52
  • MEMBER
  • 2003 CHEVROLET S-10
  • 4.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 148,000 MILES
I just acquired this truck listed above crew cab. The owner said the fuel gauge was not working, and he bought a new pump assembly. I installed the new fuel assembly, and the gauge is still not working. The engine runs okay, I am just not sure what to check next.
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Monday, August 12th, 2024 AT 6:08 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
If you have a new pump and sender chances are the problem is the gauge itself, but here is the wiring diagrams so you can test the connection between the sender and the PCM which drives the gauge. This guide can show you how and I have included how to remove the instrument cluster so you can get a used are rebuilt unit. There is a slight chance the PCM is bad FYI.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the images (below). Let us know how it goes.
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Monday, August 12th, 2024 AT 10:59 AM
Tiny
CASTAWAY52
  • MEMBER
  • 9 POSTS
Ken, the wiring diagram on the power train control module for the fuel gauge wiring says it is for a 2.2 L only will it still work I have a 4.3L?
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Tuesday, August 20th, 2024 AT 11:43 AM
Tiny
KEN L
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I says it is for both engines with slight wiring variations for the differences.
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Wednesday, August 21st, 2024 AT 8:46 AM

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