Get all the great features of Terminator self-tuning EFI in a plug-and-play system for GM’s popular '97-'07 Truck engines! These EFI systems are all designed to be click-connect with the factory sensors, ignition, and injectors.  Swap in the included Wideband O2 sensor, connect the sensors, coil harnesses, and ignition harness, then run the super-easy setup wizard on the included 3.5-inch handheld.  Turn the key, start and drive.  From that point forward the ECU and wideband O2 sensor work in concert to refine the base fuel map so that the tune just gets better and better.  No programming, no elaborate wiring, no laptop required!

That's All You Have To Do...But Not All You Can Do!

Once you're up and running the sky is the limit. Boost control, nitrous control, custom I/O configurations. You can control most features using nothing more than the included 3.5-inch handheld display. Do you want a bigger display? Those are available too--including Holley's 12.3-in Pro Dash. Are you more comfortable using a laptop for tuning and configuration? Holley's EFI Software is industry-leading in both it's ease of use and capability.

Which Terminator LS MPFI System Is Right For Me?

Holley has made it easy to get just the right system for your specific requirements. That means you aren't getting some universal-fit kit that requires a bunch of configuration but rather exactly the right system for you. Whether you need to to control a 4L60E/80E transmission or drive-by-wire throttle bodies (or both) there is a system specific to your engine and need.

NOTE: Items with strike-through have been discontinued.  Contact Us for other options.

*Note: Mid-Year change on '07 Truck Engines!  Identify crank wheel as follows:

• Engines with 24-tooth wheels will have a BLACK crank sensor connector on the engine
• Engines with 58-tooth wheels will have a GRAY crank sensor connector on the engine

What If I Need A Different Injector Harness?

Contact us. We're generally able to accommodate customizations with no problem!

This Is More Expensive than Terminator X. What's The Difference?

You're right--the Terminator LS systems are more expensive than the Terminator X and Terminator X-Max systems for the LS engines. But for all of their similarities these are quite different systems in terms of capability.

Both are intended to be plug-and-play EFI Systems for the GM LS and truck engines. Both offer versions for users needing to control fuel/spark only, or electronic transmission control, or Drive-By-Wire control (or both.) But the Terminator X family is intended to be a more budget-friendly solution and, as a result, gives up some of the more advanced features of the Terminator.

The Terminator systems available on this page feature either Holley's HP ECU (those that do fuel and spark control without transmission or DBW control) or Holley's Dominator ECU (those that do transmission and/or DBW control.) These ECUs have features that make them competitive with the best aftermarket ECUs the industry has to offer.  Plus, the HP and Dominator ECUs in the Terminator LS MPFI Systems have world-renowned hardness features that make them nearly bullet-proof in harsh environments.

Bottom line: If you don't need the extra features, if the battle-ready case and potting are not necessary for the environment you are in, then you might be better off with the Terminator X LS or Terminator X-Max LS. Download and browse the comparison chart below. References to "HP" and "Dominator" are the ECU's included with these Terminator LS systems. The Terminator X and Terminator X-Max ECU's are so-listed.

Not Sure? Review this product documentation before you buy!

 
Owners Manual
Holley Terminator LS MPFI Fuel Injection System

 
Comparison Chart
Holley Terminator vs. Terminator X Series