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8/20/2026 8:12:45 PM EDT
It's, a 2021.

Anyone recommend a kit/vendor and installed the kit.
Expectations/ results.

This could be a diy. I have access to tools. 6.6 l5p
8/20/2026 9:09:17 PM EDT
[Last Edit: raverill][Edited] [#1]
I helped my cousin reprogram the ECU and transmission using VCM Editor and an Empire Diesel tune, I forget the kit he bought for exhaust.  He had a 2021 duramax

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