GTX Watchdog Performance Monitor
GTX Watchdog, optimized for Ram Cummins® vehicles, is a the latest in performance monitoring–loaded with features. The device starts up incredibly fast (even when remote starting the vehicle), and is super responsive, sporting a 5” full color touchscreen. It gives drivers the ability to monitor SAE and Cummins-specific PIDs, or engine parameters, on an easy-to-use device.
* This product is not legal for sale or use in California on pollution controlled motor vehicles


Features vary for each vehicle and are not available on all vehicles


Bully Dog’s 5” capacitive touchscreen is the first of its kind. Graphics and gauges are displayed in brilliant HD color, rivaling today’s smart phones. GTX Watchdog starts up incredibly fast (even when remote starting the vehicle), and provides an ultra-responsive user experience. A fully customizable user interface means your perfect gauge layout is available at the touch of the screen. GTX Watchdog comes standard with a convenient grab n' go magnetic mounting system, enabling drivers to keep their device front and center–and then stowed away in seconds.


The lightning-fast GTX Watchdog gives drivers the ability to monitor the industry’s most extensive SAE and Cummins-specific engine and transmission parameters, in real time. Unlike competitors, the GTX Watchdog provides monitoring capability of the Aisin & 68RE transmission, as well as chassis cab vehicles. The device’s datalogging capability makes it easy to record vehicle performance and play it back with Bully Dog’s free LiveLink software. GTX Watchdog also doubles as a diagnostic tool with the ability to read and clear diagnostic trouble codes (check engine light). With integrated WiFi capability, GTX Watchdog is always up to date.


With the included Bully Dog Cummins Unlock cable, 2013-2016 Dodge Cummins owners can use the GTX Watchdog to unlock their truck’s computer for tuning. Bully Dog’s BDX and GT Diesel offer preloaded tuning for the 2013-2016 Cummins. The Unlock provided by the GTX Watchdog is also compatible with other custom tuning solutions, enabling drivers to choose the best option to match their needs. Bully Dog does not currently offer custom tuning for Cummins.


  1. Accelerator Pedal Position
  2. Accelerator Pedal Position (Relative)
  3. Actual Engine % Torque
  4. Altitude Adjust Table Select High*†
  5. Altitude Adjust Table Select Low*†
  6. Ambient Air Pressure
  7. Ambient Air Temperature
  8. Barometric Pressure
  9. Battery Voltage
  10. Charge Cooler Temperature
  11. Charge Flow
  12. Charged Air Cooler Outlet Temp
  13. Compressor Inlet Density
  14. Compressor Outlet Temp
  15. DPF Operating State
  16. DPF Soot Level
  17. Diesel Exhaust Fluid Line Press
  18. Diesel Particulate Filter Press
  19. Drivers Demanded Engine % Torque
  20. EGR Cooler Efficiency
  21. EGR Flow Rate
  22. EGR Position
  23. EGR Temperature*†
  24. EGR Valve Position
  25. EGT-1 DOC Inlet Temperature
  26. EGT-2 DOC Outlet Temperature
  27. EGT-3 DPF Outlet Temperature EGT-4 SCR CAT Mid-Bend Temperature
  28. EGT-5 SCT CAT Outlet Temperature
  29. Engine Coolant Temperature
  30. Engine Load (Absolute)
  31. Engine Speed
  32. Engine Torque
  33. Engine Torque Actual
  34. Engine Torque Control
  35. Engine Torque Desired
  36. Exhaust Pressure*
  37. Fuel Control*†
  38. Fuel Level Remaining
  39. Fuel Pressure Reg Current
  40. Fuel Rail Pressure (Actual)
  41. Fuel Rail Pressure (Commanded)
  42. Horsepower (Rotational)
  43. Injector Duty Cycle - Bank 1
  44. Injector Duty Cycle - Bank 2
  45. Intake Manifold Temperature
  46. Intake Throttle Position
  47. Line Pressure
  48. MPG (Average)
  49. MPG (Instant) Oil Pressure*†
  50. Main Injection Fuel Quantity
  51. Main Injection Time
  52. Main Injection Timing*†
  53. Mass Air Flow
  54. Pedal Position
  55. Pilot Timing*†
  56. Post 1 Fuel Quantity
  57. Post 2 Fuel Quantity
  58. Post 3 Fuel Quantity
  59. Post 4 Fuel Quantity
  60. Post Timing*†
  61. Radiator Fan Speed
  62. Regen State
  63. Throttle Pos (Actual)
  64. Throttle Pos (Commanded)
  65. Torque Converter Clutch
  66. Transmission Gear (Actual)
  67. Transmission Gear (Commanded)
  68. Transmission Oil Temperature
  69. Turbine Speed
  70. Turbo Boost
  71. Turbo Compressor Inlet Temp
  72. Turbocharger Speed
  73. VGT % Closed (Commanded)
  74. VGT Actual Position
  75. VGT Actuator % Closed (Commanded)
  76. VGT Desired Position*†
  77. Vehicle Odometer
  78. Vehicle Speed
  • * Unique to GTX Watchdog
  • † Requires EFI Live


These are definitely worth having.

  • LiveLink

    • This app is used to view, data log, record & playback your vehicle's PCM data on a laptop computer.

      Download Now

      OS Requirements: Windows Vista/7/8/10

  • Updater

    • This app lets you update your device's Firmware, Tune Revision or to load Custom Tunes onto your device.

      Download Now

      OS Requirements: Windows Vista/7/8/10