Holley Terminator X Max EFI Kit Early Gen V LT4 Engines & 6L80/6L90E Transmission Chevy/GMC C/K 1988-1998

Take the reins of your early Gen V LT4 engine, whether it has a 6L80 or 6L90E transmission, via the Terminator X Max EFI kit (550-1633-6)! Proudly made by Holley, this kit fits like a glove within 1988-1998 Chevy and GMC C/Ks. It lets you test boost against time, gear, RPM, and speed. You can even precisely control wet and dry nitrous system with the built-in nitrous control, which features target closed loop AFR. Don’t worry about accidentally pushing your engine past its limits as boost and rich/lean safeties are included.

Features and Benefits:
- Great for Early GM Gen V LT Swap in Vintage Vehicles
- GM 4L60 and 4L80 Transmission Control
- GM LS and LT Drive-by-Wire Throttle Body Control
- Boost Control: Boost vs Time, Gear, RPM, or Speed
- Nitrous Control: Wet or Dry, Target Closed Loop AFR, & More
- Features Boost & Rich/Lean Safeties
- 3.5” Handheld Tuner Eases Installation via Calibration Wizard
- Tuner has Integrated Data Logging
- Includes Factory Fuel Injectors & Fuel Pumps
- Engine Harness Plugs Directly into Factory LT Sub-Harness
- 4 Inputs: 12v, Ground, 5v, & Frequency; 4 Outputs: Ground & PWM
- Inputs and Outputs are Programmable for Electric Fans & More
- Features GDI & VVT Support
- Genuine Bosch LSU 4.9 Wideband Control
- On-Board Diagnostic LEDs for Wide Variety of Issues
- Built-in 1bar MAP Sensor & Vacuum Hose Adapters
- (4) 1D Tables, (1) 1D Gear Table, (4) 2D Tables, & (1) 2D per Gear Table
- Easy-to-Use Software Suite that Allows Full Laptop Access

Not only do you get GM 4L60 and 4L80 transmission control with this kit, but you also get LT drive-by-wire throttle body control. This ensures you’re fully in charge, with the ability to program the inputs and outputs for electric fans too. As for the 3.5” handheld tuner, it has built-in data logging and simplifies installation by using a calibration wizard. For more hands-on tuning though, the software suite grants complete access to the tuning on a laptop. Plus, the on-board diagnostic LEDs display statuses like ECU power and cam signals so you’re always aware of how the engine is running.

Vehicle Fitment:
- 1988-1998 Chevy/GMC C/K
- Compatible with 6L80 and 6L90E transmissions
*For early GM Gen V LT4 engines ONLY

Tech Tips:
- For boosted applications, you can disable the internal MAP sensor and use an external LT MAP sensor.
- To identify if your engine is an early or late application, refer to your fuel pressure sensor, located behind the intake manifold. Early sensors have a 4-pin connector, whereas late sensors have a 3-pin connector.

Please Note: The Bosch LSU 4.9 wideband control will NOT work with LSU 4.2 oxygen sensors.