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The 2004 Chevrolet TrailBlazer requires SAE 5w-30 fully synthetic motor oil for its engine and can hold up to 7 quarts in the 4.2 liter, inline-6 motor. You will need around 6 one-quart bottles of oil for a full change. Prices per quart range from $3.23 to $14.32, and the oil can be purchased at various retail outlets and online from reputable sellers. To carry out the oil change, start by draining the old oil through the bottom nozzle of the reservoir. Then, remove the top cap and carefully pour in the new oil.
A 2004 Chevy Trailblazer requires as much as seven quarts of oil when changing the oil.