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The trans in the that model should be a 4L65, the input shaft is a touch bigger and I believe that has the 5 gear planetary inside. You can ask the dealer for the RPO code and most of the codes where inside the glove box. It will be a 3 digit alfa/number or combo of both.

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βˆ™ 12y ago
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Q: Is 2003 z71 have 4l60e tranny?
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