fuel guage is erratic

Asked by GuruDYQGD1 Mar 28, 2024 at 12:04 PM about the 2004 Chevrolet Trailblazer LS 4WD

Question type: Maintenance & Repair

2004 Trailblazer fuel guage seems to work when ignition is turned ON, but goes
to full when engine started and will frequently drop to empty after that. After 15
minutes of driving it will go to correct reading..

4 Answers
310,265

Gene answered 7 months ago

Erratic gauge stepper motor or wiring issues like dash grounds.

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157,625

James answered 7 months ago

A bad ground will cause the gauge to go to empty and a bad power wire will cause the gauge to go to full, or past full. Hope that helps! Jim

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