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Need a way to adjust your EFI LIVE power levels on your Duramax ? Well look no further, the engineers at Fish Tuning have what you need in their 5 position switch and we have them in stock and can ship them out today!

Fits: LBZ/LMM Gray and Black Wires

EFI maps need to be setup to work with switches

Changes tunes on the fly!

GRAY Wire= Connector 1 (the larger plug), Pin 46

Black Wire + Connector 1 (the larger plug), Pin 54

Fish Tuning -DSP5 Switch for EFI Live tuning (Grey Wire) LBZ-LMM Duramax...

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