As GM 3.6 specialists, we offer the best tuning and unique products for your 3.6 motor. Our suggested modpath for the 2017-current C/C twins platform is as follows:




We are very pleased to be a premier tuner for the 3.6 Direct Injection LGX V6 found in your 2017 to present Colorado and Canyon V6 pickups. The benefits of an Overkill tune are straight forward: More power, more natural throttle response, improved transmission behaviour, and support for your additional modifications. Whether you're a serious car enthusiast, or you're just looking to make your 300 Horsepower truck FEEL like a 300 horsepower truck, Overkill is here to help achieve your goals!

What you'll notice:
  • Horsepower gains of 22 wheel horepower on 91 octane with no other modifications
  • Improved response from the throttle pedal, fixes lag and surge on takeoff, no dead pedal feel while cruising, NO NEED FOR EXTERNAL THROTTLE BOOSTERS!
  • Transmission tuning: Fully rewritten transmission shift points: Upshift points improved to reduce bogging around town and make the car feel lighter on its feet, improved towing performance.
  • Tuning support for your aftermarket intake systems, no check engine lights
  • Displacement On Demand can be disabled
  • Speed limiter removed, Rev Limiter in Park/Neutral raised
  • No Charge Retuning For Future Modifications for as long as you own your truck
  • Return to factory tuning at any time within 60 seconds for trips to the dealership


What you'll get with your purchase:
  • An Autocal handheld tuning device
  • Overkill 91/93 octane tune
  • Tuning support for datalogging and custom revisions
  • Tuning support for new mods as you add them, for as long as you own the vehicle


Why get an Overkill tune versus the competition?
  • Specialized in the LGX motor. From reworking the tune on a factory vehicle in great detail to being the first to tune a supercharged LGX, an Overkill tune is far more comprehensive and experienced than what you'll get at your local dyno shop.
  • Datalogging. You'll get your Overkill tunes but it doesn't stop there. You can scan with our handheld while driving and send that data for review and tune updates, to get a tune that's more customized for your vehicle
  • Support for your mods. Not only is Overkill the only tuning company offering support for your aftermarket intake systems, Overkill is working to bring new unique products to this platform such as our larger 80mm throttle body kit, and you can be sure Overkill will have the right tuning to ensure you get the most from them!
  • Retunes. With our handheld, retuning for your future modifications is complimentary and easy to provide
Important Note for Transmission Tuning - For 2017+, GM heavily encrypted its 8-speed Automatic transmission computer modules. In order for this module to be tunable, it needs to go through an unlock procedure through HP Tuners. You can still get the engine tune from us without going through this service. If you want our Overkill transmission tuning as well, you need to go through this separate and unavoidable service through HP Tuners before we can tune the transmission computer on 2017-current 8-speed automatics. You can purchase this service from HP Tuners for $199 using this link https://www.hptuners.com/product/tcm-modification-service




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Any Current Modifications?




Autocal Handheld: The best way for us to provide tuning for your C/C pickup is through our Autocal handheld system. The Autocal handheld allows you to take the handheld to the vehicle, read the factory file, upload our Overkill tunes and provide scan data using just the handheld unit inside the vehicle. Return to stock calibration whenever you want, apply updates and retunes easily through email with us and Overkill retuning is available at no charge for as long as you own your vehicle. You'll need a computer that can run a windows based program and has a USB port to transfer files to and from the handheld.





Overkill is also a Diablosport custom tuner. Already have an Intune or Trinity from Diablosport? Upgrade it with Overkill tuning! You'll receive our Overkill tunes and tuning support for as long as you own the truck. Overkill tunes get loaded to the handheld and can be flashed just like the Diablo tune. 87 octane, 91/93 octane and E85 tuning all included in the purchase.

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Enter Truck's Modifications





The only larger throttle body for the 2012+ LFX 3.6 is available here at Overkill. The factory throttle body is 72mm. Our 80mm throttle body solution dwarfs the stock unit and bolts directly to your Colorado/Canyon intake manifold which already has a 79.5mm inlet to take full advantage of this larger throttle body! One of the best upgrades you can do beyond our tune, this throttle body setup will improve horsepower at a dyno tested 11+ wheel horsepower, improves throttle response (particularly with Overkill tuning) and changes the intake note of the V6 to a deeper growl at heavy throttle.

Throttle body is a brand new unit, comes with an aluminum adapter plate, stainless steel bolts and some parts to assist installation.

Tip: This throttle body has a 3.5" clamping area, compared to the factory throttle body of 3". Ensure you have a solution available before installing the throttle body! Requires no tuning but works even better with Overkill tuning (if you're an Overkill tune user, you get a no charge revision for your Autocal).