Chevy and GMC Duramax Diesel Forum - View Single Post - L5P RPM surge during decel
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post #4 of (permalink) Old 07-30-2019, 11:52 AM Thread Starter
Join Date: Jul 2019
Posts: 4
Correct, it is trying to downshift from 2nd to 1st. There is an error in their programming which they do not want to acknowledge.

2019 Chevy 2500HD Duramax - Stock
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