2003 GMC Envoy XL Computer Programmers

Superchips Flashcal Programmers

From $215.95

• The Flashcal is the ultimate calibration tool for the essential JK accessories. With Flashcal, you can now take full advantage of the most popular aftermarket upgrades available. Features Include: Corrects speedometer for tire upgrades between 26? - 42?. Speedometer recalibration for gear /axle swaps up to 5.38 and beyond. Transfer case Hi and Lo locking options (2007-15 Rubicon only). ESP stability optimization (2011-15 automatic transmission only). Engine idle adjustability for winching. Street legal TPMS adjustability (Off-Road options available for download). Daytime running light options (2007-15 models only). Radio delay options (2011-15 models only). Headlamp delay options (2011-15 models only). Horn chirp and exterior lighting flash options when locking doors with keyless entry. Reads and clears diagnostic trouble codes. Internet updatable.
• California Residents: WARNING

SCT Performance LiveWire TS+ Performance Programmer and Monitor

From $399.00

• From the factory, your vehicle's computer is calibrated for the masses, designed with the average driver in mind, not the performance enthusiast. This not only leaves valuable Horsepower & Torque hidden inside your vehicle, but it also makes for a mediocre driving experience. The Livewire TS unlocks your vehicle's hidden performance by re-calibrating your vehicle's computer for Maximum Horsepower & Torque, Increased Throttle Response, Firmer Shifts and even Increased Fuel Mileage.
• California Residents: WARNING

Edge CTS2 Evolution Programmers for Gas and Diesel

From $34.99

• The Evolution CTS2 reprograms your vehicles stock computer. It resides in the cab with one simple cable connection to the OBDII (diagnostic) port. The Evolution is used to save the stock files from the vehicles computer and then upload the Edge calibrations into the vehicles computer. This amazing product is available for both gas and diesel pickups and SUVs. This product comes with multiple power levels custom tuned by a whole team of engineers, and can be installed in minutes without ever popping the hood. The Evolution CTS2 greatly increases horsepower and torque. Not only does it re-tune your vehicle, it stays mounted in the cab and features real-time, monitoring of vital engine data.
• California Residents: WARNING

DiabloSport Trinity Performance Programmers

From $471.95

• Number of Power Level Settings:Vehicle Dependant
• Select Power Level On The Fly:Yes
• Rev Limiter Adjustment:Yes
• Top SpeedAdjustment: Yes
• InternetUpdatable:Yes
• Monitor:Yes
• Automatic Transmission Adjustment:Yes
• Approximate Power Gains:Varies by vehicle
• High Resolution 320x240 Full Color Touch Screen
• Virtual Gauges-customize your own gauge layout
• Virtual Dragstrip-computes 1/4 mile, 1/8 mile, 0-60, and 0-100 track times
• State Legal: 49 State
• inchIn California, this part may not be used upon a highway and may only be used for race purposes inch
• California Residents: WARNING

Jet Performance Products EZ-Tune Programmers

From $262.99

• Designed to operate your engine at peak efficiency
• Improve horsepower and mileage
• Corrects the speedometer and turns off the ABS system trouble light
• Easily plugs into the vehicle's diagnostic port under the dash
• Built-in scan tool with live data monitoring
• California Residents: WARNING

Jet Performance Products Program For Power Jet Performance Programmer

From $337.99

• The JET Performance Programmer lets you take control and program your own vehicle computer to match your driving style. JET?s exclusive Tri-Power tuning allows you to program for performance using lower cost regular octane fuel, or for optimal performance gains you can program for midgrade or premium fuels. All three tuning modes are designed to operate the engine at peak efficiency based on the octane level being used to improve horsepower and mileage. The advanced technology and design of the JET Programmer gives you the ability to modify air and fuel ratios, ignition timing, shift points, shift firmness, speed limiter and rev limiter settings. The programmer will also correct your speedometer and turn off the ABS system trouble light if you change tire size or gear ratios. Also includes a built in scan tool to read and clear diagnostic trouble codes when your check engine light comes on saving you a costly trip to the dealer. The programmer simply plugs into the vehicle?s diagnostic port under the dash and then the easy to use installation software allows you to make your changes by answering simple yes or no questions. Take the next step in performance tuning with the JET Performance Programmer!
• California Residents: WARNING

Jet Performance Dynamic Spectrum Tuner Programmers

From $399.99

• The JET Performance Programmer lets you take control and program your own vehicle computer to match your driving style. JET?s exclusive Tri-Power tuning allows you to program for performance using lower cost regular octane fuel, or for optimal performance gains you can program for midgrade or premium fuels.
• California Residents: WARNING

Jet Performance Speedo Pro Programmers

From $217.99

• Jet Speedo Pro Programmer is designed for the owner who has changed tire size or gear ratios, or both, and wants to correct the speedometer and automatic shift points controlled by the vehicle computer. This unit includes a scan tool to read and clear any engine diagnostic trouble codes and is upgradeable to the full Performance Programmer version
• California Residents: WARNING

Diablosport Predator 2 Tuners

From $364.95

• Performance programs add horsepower and economy
• User adjustable options like tire size, gears, shifting and more
• High speed OBD-II Data Logging
• Reads/Clears Diagnostic Codes
• USB for updates and downloads
• Part numbers specific to various vehicle categories
• Supports domestic gas and diesel, cars and trucks
• 50 State Legal
• California Residents: WARNING

Superchips Dashpaq Performance Tuners

From $734.95