Flex Fuel Kit — Gen 3 (P59/0411)

Adds ethanol content sensing to a Gen 3 LS so the calibration can read the blend in the tank instead of assuming pump gas.

• In the box: OEM GM ethanol content sensor (Continental), braided stainless fuel line and adapter, install harness using OEM GM connectors, fuel line disconnect tool, and vehicle-specific pinout and wiring instructions.
• How it signals: The sensor output splices to a spare frequency input on the PCM. Pinout is included.
• Fits: Gen 3 LS — LS1, LS2 and LS6 — on P01 / P59 PCMs. Confirm your year and PCM with the vehicle picker before ordering.
• Reversible: it is a sensor and a signal harness. The hardware comes back out and the calibration returns to straight gasoline whenever you want.
• Also required: the PCM has to be calibrated to read the sensor. This kit is the hardware only.

Vehicles this kit covers

• Chevrolet Silverado 1999–2006
• Chevrolet Silverado 2007 (Classic — Old Body)
• Chevrolet Tahoe / Suburban 2000–2006
• Chevrolet Avalanche 2002–2006
• GMC Sierra 1999–2006
• GMC Sierra 2007 (Classic — Old Body)
• GMC Yukon / Yukon XL 2000–2006
• Cadillac Escalade 2002–2006
• Pontiac GTO 2004
• Hummer H2 2003–2007

Sold for off-road / competition-use vehicles only.