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No reprogramming needed if whomever you purchase it from looks up your VIN and matches the TEHCM part number in the replacement trans to your current transmission's TEHCM. You just need to do a fast adapt relearn. Any bidirectional scan tool w/adapt reset functionality will work.I am needing to replace my transmission on our 2016 Chevy Tahoe, My main question is, After replacing, Do i need to have a special type of tool to reprogram, or recalibrate?? OR is it a simple swap like the older days.