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Supported Vehicles
Flex Fuel Kit Fitment
Every kit is $229.99 — one price, every supported platform. A tune is required to activate flex fuel — enable it in your own calibration, or send your PCM in to us.
Cadillac
| Model | Years | Engine | PCM / ECM | Kit | Buy |
|---|---|---|---|---|---|
| CTS-V | 2009–2015 | LSA | E67 | Gen 4/5 | $229.99 |
| CTS-V | 2016–2019 | LT4 | E92/E92A | Gen 4/5 | $229.99 |
| Escalade | 2002–2006 | 6.0 | P01 / P59 | Gen 3 | $229.99 |
| Escalade | 2007–2014 | 6.0 / 6.2 | E38 | Gen 4/5 | $229.99 |
| Escalade | 2015–2020 | L86 | E92/E92A | Gen 4/5 | $229.99 |
Chevrolet
| Model | Years | Engine | PCM / ECM | Kit | Buy |
|---|---|---|---|---|---|
| Corvette | 2005 (C6) | LS2 | E40 | Gen 3.5 | $229.99 |
| Corvette | 2006–2013 (C6) | LS2 / LS3 | E38 / E67 | Gen 4/5 | $229.99 |
| Corvette | 2009–2013 (C6 ZR1) | LS9 | E67 | Gen 4/5 | $229.99 |
| Corvette | 2014–2019 (C7 Stingray) | LT1 | E92/E92A | Gen 4/5 | $229.99 |
| Corvette | 2015–2019 (C7 Z06) | LT4 | E92/E92A | Gen 4/5 | $229.99 |
| Camaro | 2010–2015 SS / 1LE / Z28 | L99 / LS3 | E38 | Gen 4/5 | $229.99 |
| Camaro | 2012–2015 ZL1 | LSA | E67 | Gen 4/5 | $229.99 |
| Camaro | 2016 & Newer SS | LT1 | E92/E92A | 6th Gen Camaro | $229.99 |
| Camaro | 2017 & Newer ZL1 | LT4 | E92A | Gen 4/5 | $229.99 |
| Silverado | 1999–2006 | 4.8 / 5.3 / 6.0 | P01 / P59 | Gen 3 | $229.99 |
| Silverado | 2007 (Classic — Old Body) | 4.8 / 5.3 / 6.0 | P59 | Gen 3 | $229.99 |
| Silverado | 2007–2013 | 4.8 / 5.3 / 6.0 | E38 / E67 | Gen 4/5 | $229.99 |
| Silverado | 2014–2018 | L83 / L86 | E92/E92A | Gen 5 Truck | $229.99 |
| Silverado | 2019–2022 | L83 / L86 | E92A | Gen 4/5 | $229.99 |
| Tahoe / Suburban | 2000–2006 | 5.3 / 6.0 | P01 / P59 | Gen 3 | $229.99 |
| Tahoe / Suburban | 2007–2014 | 5.3 / 6.0 / 6.2 | E38 | Gen 4/5 | $229.99 |
| Tahoe / Suburban | 2015–2020 | L83 / L86 | E92/E92A | Gen 4/5 | $229.99 |
| Avalanche | 2002–2006 | 5.3 | P01 / P59 | Gen 3 | $229.99 |
| Avalanche | 2007–2013 | 5.3 / 6.0 | E38 / E67 | Gen 4/5 | $229.99 |
| Trailblazer SS | 2006–2007 | LS2 | E40 | Gen 3.5 | $229.99 |
| Trailblazer SS | 2008 | LS2 | E67 | Gen 4/5 | $229.99 |
| SS Sedan | 2014–2017 | L77 / LS3 | E38 | Gen 4/5 | $229.99 |
GMC
| Model | Years | Engine | PCM / ECM | Kit | Buy |
|---|---|---|---|---|---|
| Sierra | 1999–2006 | 4.8 / 5.3 / 6.0 | P01 / P59 | Gen 3 | $229.99 |
| Sierra | 2007 (Classic — Old Body) | 4.8 / 5.3 / 6.0 | P59 | Gen 3 | $229.99 |
| Sierra | 2007–2013 | 4.8 / 5.3 / 6.0 | E38 / E67 | Gen 4/5 | $229.99 |
| Sierra | 2014–2018 | L83 / L86 | E92/E92A | Gen 5 Truck | $229.99 |
| Sierra | 2019–2022 | L83 / L86 | E92A | Gen 4/5 | $229.99 |
| Yukon / Yukon XL | 2000–2006 | 5.3 / 6.0 | P01 / P59 | Gen 3 | $229.99 |
| Yukon / Yukon XL | 2007–2014 | 5.3 / 6.0 / 6.2 | E38 | Gen 4/5 | $229.99 |
| Yukon / Yukon XL | 2015–2020 | L83 / L86 | E92/E92A | Gen 4/5 | $229.99 |
Hummer
Pontiac
| Model | Years | Engine | PCM / ECM | Kit | Buy |
|---|---|---|---|---|---|
| GTO | 2004 | LS1 | P59 | Gen 3 | $229.99 |
| GTO | 2005–2006 | LS2 | E40 | Gen 3.5 | $229.99 |
| G8 | 2008–2009 GT / GXP | L76 / LS3 | E38 | Gen 4/5 | $229.99 |
Not yet supported: Chevrolet Silverado 2023 & Newer, GMC Sierra 2023 & Newer.
This is the complete list of vehicles we build flex fuel kits for. If a vehicle is not shown above, we do not offer a kit for it and cannot build one to order. Running a standalone ECU? The Universal kit fits any ECU with a flex fuel input, and the Terminator X kit covers Holley.
Install
Three Steps to Flex
01
Plumb the Sensor
Disconnect your fuel line and install the sensor inline with the fuel feed using the supplied hose
02
Plug in
Unplug your coil and plug in the inline jumper harness provided. This provides power to the sensor. Then insert signal pin into PCM — we give you the exact pin for your platform.
03
Flash the Tune
Enable flex fuel in the calibration or ship your PCM to us to flash (usually same day turnaround). Fill up with E85, 91 or any mix and enjoy the benefits
Every Kit Includes
What's In The Box
✓OEM GM ethanol content sensor (Continental)
✓ Braided stainless fuel line / adapter
✓ Install harness — OEM GM connectors on GM applications
✓Fuel line disconnect/removal tool
✓ Vehicle-specific pinout & wiring instructions
Good To Know
Flex Fuel FAQ
Do I need bigger injectors or a bigger pump?
E85 needs roughly 30% more fuel volume than gasoline. Stock-ish power is usually fine on the factory pump and injectors. Higher-output or boosted builds should plan injector and pump headroom for full E85.
Will it harm fuel system?
Most modern fuel systems are designed to handle ethanol. California gas is usually approx 10% ethanol out of the pump so most modern cars address this with stainless fuel lines and ethanol resistant soft lines. If adding to a vehicle manufactured before the 2000's, it's a good idea to replace any soft or rubber lines with modern ethanol resistant fuel lines.
Is the install reversible?
Yes — it's a sensor and a signal harness. The hardware comes back out and the tune can be flipped back to straight gasoline anytime.
Can Hi-Rev just tune it for me?
Absolutely. Buy the kit and add a mail-in or in-house flex tune — send a datalog, ship us the PCM or bring the car and we'll dial in the blend table, timing, and fueling.