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04.5-05 GM LLY 6.6L Duramax Banks Six Gun Diesel Tuner W/ Banks iDash SuperGauge

Calibrated for sport, Six-Gun delivers pavement-shredding power; has 6 change-on-the-fly power levels; is Stacked for Power to timing and fuel pressure; and has exclusive AutoRate and ActiveSafety engine and transmission safeguards. Enhanced vehicle monitoring and diagnostics with iDash SuperGauge.

US Patent # 7,593,808 & # 7,254,477


Fitment Note

Fits 2004.5-2005 Chevy/GMC 2500/3500 6.6L Duramax, LLY Only

2004 was a split year between LB7 and LLY engines. Check which engine you have. Locate the 8th digit of the VIN. 1 is LB7 and 2 is LLY



Optimum fuel tuning for awesome power, built-in safety and adjust-on-the-fly power, plus temperature limiting control w/optional Temp Limit Kit.

Tuning that doesn't kill the host vehicle.
Many tuners reduce fuel delivery as exhaust gas temps rise. But they ignore the powertrain! Banks finds the limits of the engine and powertrain, then adds mission-critical ActiveSafety safeguards to Six-Gun so it won’t exceed those limits. Every Banks Tuner comes standard with our exclusive AutoRate® and ActiveSafety® engine and transmission safeguards. Designed to protect your vehicle's drivetrain and keep your truck running strong. As a result, Banks Six-Gun destroys the competition, NOT your truck!

Proof of a higher power.
Stacked for Power® and calibrated for sport applications, Six-Gun is a performance junkie that adds +102 hp/+275 lb-ft. With its CleanTune® Technology and change-on-the-fly power, Six-Gun rockets you from 0-60 mph 21% quicker and 148 feet ahead of stock ... without adding soot!

Banks iDash SuperGauge is packed full of awesome! Use it for total control of your Six-Gun Tuner. Achieve best gains with a touch of your finger. Set and monitor EGT, coolant temps and a vast array of other engine parameters. Scan/define/clear vehicle diagnostic codes.

All gains measured at the rear wheels, with recommended airflow improvements.

For best Six-Gun Tuner performance, Banks always recommends airflow improvements.



  • Gain up to +102 hp/+275 lb-ft at rear wheels
  • Destroys the competition, not your vehicle!
  • ActiveSafety protects engine/powertrain
  • 6 change-on-the-fly power levels
  • 0-60 mph in 29% less distance!
  • Enhanced vehicle monitoring
  • Read and clear codes
  • Loaded with Features
  • Value Priced
  • Easy Install


2004 Chevy Silverado 6.6L Duramax LLY rear-wheel Horsepower2004 Chevy Silverado 6.6L Duramax LLY rear-wheel Torque
Six-Gun, Level 6StockBanksImprovementResults
Rear-wheel Horsepower: Best gain

229 hp
@3200 rpm

331 hp
@3200 rpm

+102 hp

45% more
Rear-wheel Torque: Best gain

445 lb-ft
@2000 rpm

720 lb-ft
@2000 rpm
+275 lb-ft62% more
Rear-wheel Horsepower: Peak-to-peak246 hp
@3000 rpm
346 hp
@3000 rpm
+100 hp41% more
Rear-wheel Torque: Peak-to-peak449 lb-ft
@1800 rpm
720 lb-ft
@2000 rpm
+271 lb-ft60% more
Acceleration, time: 1/8 mile11.49 secs10.66 secs-0.83 secs7% quicker
Acceleration, speed: 1/8 mile64.3 mph73.3 mph+9.0 mph14% faster
Acceleration, time: 1/4 mile17.53 secs16.06 secs-1.47 secs8% quicker
Acceleration, speed: 1/4 mile80.6 mph91.2 mph+10.6 mph13% faster
Acceleration, time: 0-60 mph10.18 secs8.00 secs-2.18 secs21% quicker
Acceleration, distance: 0-60 mph511 feet363 feet-148 feet29% shorter

Test vehicle: 2004 Chevrolet Silverado 2500, crew cab, long bed, single rear wheel.

Engine: Duramax 6.6L LLY.
Transmission: Allison 5-speed automatic.

Horsepower and torque measured at rear wheels.

Engine differences in 2004 vehicles: Early 2004 vehicles LB7 engine (8th VIN digit - 1) Late 2004 vehicles LLY engine (8th VIN digit - 2)

Upgradeable options include Banks iDash and airflow components to build a complete engineered power system.


Banks Power: 61412

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