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Granatelli Big-G Flash Tools


Granatelli
Granatelli Big-G Flash Tools

Product images may differ from actual product appearance.

Granatelli's Big-G Flash Tools install easily in minutes with no computer skills required. This tool will add horse power and torque to give you increased performance. Gas vehicles will gain 15-35 rear wheel horsepower and diesel vehicles will gain up to 140hp and 250 ft./lbs. of torque! Not only does the Big-G Flash Tool add performance, but it will also erase and scan DTC's.

Features and Benefits:

  • 64MB Ram
  • Largest backlit screen available with adjustable color brightness and contrast
  • Custom tunes and updates available through Internet
  • WILL re-tune vehicle after factory re-flash of PCM
  • Gas tunes include 87 & 89 and 91 & 93 octane tunes
  • Diesel flash tools come standard with heavy towing load, regular towing load, performance & race modes
  • Won't void powertrain warranty
  • Offers adjustability of top speed limiters
  • Rev limiters in any gear
  • Shift timing & shift pressure (automatics only)
  • Speedometer re-calibration for multiple gear ratios
  • Speedometer re-calibration for multiple tire size changes



  • Diesel Engines
    Granatelli 989517-135 - Granatelli Big-G Flash Tools
    467-989517-135 2001-06 G.M. Truck and SUV
  • Duramax Diesel engines

    Installation Instructions
  • $319.99
    Gas Engines
    Granatelli 990217 - Granatelli Big-G Flash Tools
    467-990217 1998-05 G.M. Truck and SUV
  • 4.8L - 8.1L engines

    Installation Instructions
  • $299.99

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