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I believe it depends on the trim level of the 03. I have an 03 TB LTZ made early in the year with an 18.7 gallon tank. The next wave of 03 models were built with 22 gallon tanks. Looking to find one in salvage somewhere so I can swap em out! Hope this helped...

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Wiki User

15y ago
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Bentley Anderson

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3y ago

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Anonymous

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3y ago

Recently I filled my trailblazer and put just short of 23.2 gallons in what I have believed to be a 22 gallon tank. The fuel warning light had come on, but had just come on, so I was not bone dry at the time I filled up. My first thought and still is to some extent, an inaccurate measure through the pump.

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Q: What is the Gas tank size of a 2003 trailblazer?
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