1998 Chevy Blazer fuel gauge

Tiny
RPADGETT72575
  • MEMBER
  • 1998 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 120,000 MILES
Once the gas hits about a 1/4 tank the gauge will start jumping from empty to full or just bounce back and forth between 1/4 to 1/2 what could the issue be. Plus I'm getting a gurgling or boiling water sound from somewhere in the dash around the windshield on drivers side. Plus there is a buzzing sound from the dash around the glove box when the a/c is running.
Thursday, May 13th, 2010 AT 2:11 PM

4 Replies

Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
The bouncing of the gauge is the fuel pump sending unit at fault, it needs replacement. The gurgling sounds like an air pocket in the heater core. The system mostlikely needs to be "bled" and that should take care of it. The buzzing sound is probably a mixing door stuck between open and close, behind the dash.
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Saturday, May 15th, 2010 AT 3:17 PM
Tiny
RPADGETT72575
  • MEMBER
  • 5 POSTS
I was afraid of that explains some other things as well, beginning to feel shafted on buying this blazer but that's ok I've had worse
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Saturday, May 15th, 2010 AT 11:03 PM
Tiny
RPADGETT72575
  • MEMBER
  • 5 POSTS
@legitimate007
How long can I go before the sending unit needs replacing
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+1
Saturday, May 15th, 2010 AT 11:34 PM
Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
Untill you feel you need to see the correct fuel level. There is nothing there that will cause your vehicle not to operate correctly, although, I dont know if that is a factor during emissions testing. I dont believe so.
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Monday, May 17th, 2010 AT 1:16 PM

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