BTR EFI Live DSP5 Selector Switch, Chevy (2004.5-05) 6.6L Duramax LLY (Purple Wire)

The BTR EFI Live DSP5 Selector Switch is the essential solution for tuning enthusiasts running EFI Live DSP5 on their 2004.5–2005 Chevy and GMC 6.6L LLY Duramax trucks. This OE-style rotary switch lets you shift between up to five distinct engine calibrations while driving—no shutdowns, no hassle.

Built on over 20 years of hands-on automotive electrical design expertise, the BTR DSP5 switch kit includes a smooth, positive-detent switch, pre-assembled wiring, mounting hardware, and protective loom for a professional install. The purple wire configuration is tailored specifically for the LLY ECM, ensuring a seamless fit and optimal signal connectivity (signal: grey ECM connector pin 32, ground: pin 50).

Where generic switches often fail to last, this component uses OE-grade contacts and American-engineer-tested reliability for consistent operation through years of use—your tune control should be as reliable as your truck.

DSP5 Installation Help

Pin numbers for your DSP5 Switch by model:

• LB7: Blue Wire = Blue connector, pin 69; Black Wire = Blue connector, pin 49
• LLY: Purple Wire = Grey connector, pin 32; Black Wire = Grey connector, pin 50
• LBZ & LMM: Grey Wire = Connector 1 (larger plug), pin 46; Black Wire = Connector 1 (larger plug), pin 54

Your DSP5 switch includes a nut and two washers. The bottom smooth washer must remain on the bottom with the tab located in hole number five. If this washer falls out, simply turn the switch fully counterclockwise, align the washer's tab with hole five, and reseat it. Check that the switch moves exactly four clicks clockwise. If not, repeat the process until correct.

Installation Notes:
Connect signal and ground wires to the correct ECM pins for your truck model. Detailed instructions included.

Note: Compatible only with ECMs programmed for EFI Live DSP5 switching. Always confirm compatibility with your EFI Live tuning setup before ordering.