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Modified
These are custom tunes. A custom tune is any tune that has one or more fields changed from stock factory programming.
119
7.9K
Apr 21, 2019
119
7.9K
Apr 21, 2019
Stock
These are GM factory tunes. No changes have been made to these files.
26
1.6K
Nov 11, 2017
26
1.6K
Nov 11, 2017
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LLY ECM Tunes
LLY Duramax Engine Tunes
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