WHY DOES MY FUEL GAGE KEEP FLUCTUATING BACK AND FORTH

What is your question?

when tank is between 3 quarters and full the gauge goes back and forth alot while sitting still at idle

What makes this problem better or worse?

while idling

How long has your 2002 GMC Sonoma had this problem?

a few months

conditionrogue in Beverly Hills FL

Dec 9, 2017

2 Replies

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2 Replies

Popular Answer

DaveJMon Dec 10, 2017

This sounds like a sending unit issue or a wiring issue, or a ground issue. Testing is the only way to figure it all out.

pushrodon Dec 10, 2017

Agreed ... A professional quality scan tool can quickly determine whether the instrument cluster or the tank sending unit is the culprit .. IF this is - or gets to be - a problem that you want fixed (?) .. Highly recommend visiting local auto repair facility.

pushrodon Dec 10, 2017

As a side note: Due to the location of the fuel pump//sending unit 'module' - Fuel gauge fluctuations are a common occurrence with those vehicles - including the Chevy S-10. This is more pronounced when going down grade - or when stopping the vehicle.