Optimized Stock Tune Only for EFI Hardware Duramax LLY (2004.5-2005)

Flash using your EFI Live Flash Scan or AutoCal device

You will need an EFI License that you can buy from us

Motorops Optimized Stock Tune

• Similar but better than factory settings
• Smoother running engine & power delivery
• Reduced exhaust temperatures
• 10 more horsepower over factory settings
• 20 more ft-lbs of torque over factory
• Leaves factory rev limit in place 
• Motorops tunes produce less smoke
• More consistent power delivery
• Easy installation instructions
• Telephone support during installation if needed

Recommended Option

Transmission Tuning

• Increased transmission line pressure for holding more HP and torque
• Revised shift schedule to improve drive-ability
• Keeps the truck on top of the turbo
• Improved shift timing
• Re-designed torque converter lock-up strategy
• Allows power transfer from the engine to the wheels more directly