Banks Power Derringer High Output Tuner with iDash Pro (67108)
Fits 2024-2026 6.6L Duramax V8 (L5P, updated)
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A tuner is a small box that plugs into the diagnostic port under your dash and changes how the engine computer manages fuel and boost, so the truck makes more power without swapping any physical parts. This version is built for the current 2024-and-up L5P, which GM updated to make more power from the factory (470 hp/975 lb-ft stock vs 445/910 on the 2020-2023 truck), and it comes with the iDash Pro screen for watching live engine readings.
why this one — This is Banks newest Derringer, built specifically for the 2024-2026 Sierra HD after GM bumped the factory L5P engine output that model year - using an older-generation tuner on this truck risks a mismatch with the updated factory calibration, so the year-specific SKU matters here. Six power levels let you dial power up or down depending on whether you are towing. No reflash, no trace left if removed, and no CARB EO number is shown on this page so no street-legal claim is made here.
CLAIMED (manufacturer) - bankspower.com product page for this exact SKU states output rises from 438 hp/928 lb-ft stock to 519 hp/1,068 lb-ft, i.e. "+86 hp and +178 lb-ft at the wheels," across 6 adjustable power levels. No independent dyno found this pass.
Gain shown is a manufacturer claim, not a guarantee. Price is a list price and can lag the retailer; confirm at checkout. See how we check a price and our affiliate disclosure.