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It depends on which Vortec engine you are talking about: 4.3L: 4.5 to 4.75qts 5.7L: 5 to 5.5qts 5.3L: 6qts 6.0L: 6qts 8.1L: start with 6 qts it probably takes slightly more.

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18y ago

What else can I help you with?