Keep under the hood of your 2011-2016 GM 6.6L Duramax LML looking clean after a modification when you add the Tuner Harness Plug Kit. Featuring a hassle-free installation, this Kit has the plugs necessary to seal your factory connectors. The Harness Plug Kit keeps moisture and debris from damaging the OE connectors. FEATURES: Easy to Inst
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Plug kit
Every plug you need was provided, all with great quality
O
Orlando · May 17, 2026
Did its job
Plugs did a great job. Only advice I have is bring the plugs with you when youre disconnecting everything. Disconnect a plug, find the cap, plug the cap in. Far easier than trying to remember where all the lines are at the end of the project.
M
Michael · December 9, 2024
Works great
Plugs fit super nicely and click into place. Only issue is none of them are labeled so you have to take the whole bag with you and find the right one for each plug. I did the whole kit in roughly 15 min.