Chevrolet Flex Fuel Vehicles

Factory FFV models

Still producing FFVs in 2026

One of only three brands still selling new flex-fuel vehicles

Chevrolet is the most prolific flex-fuel manufacturer in American history, and the only mainstream brand still building new FFVs for model year 2026. The Silverado 1500 has been continuously flex-fuel-capable since 2002 — a 24-year production run that makes the 5.3L Vortec V8 (and its EcoTec3 successor) the longest-running and most-produced FFV powertrain in the United States. At peak volume between 2009 and 2016, Chevrolet offered flex-fuel versions of the Silverado, Tahoe, Suburban, Avalanche, Express vans, Impala, Malibu, Equinox, HHR, Monte Carlo, and Uplander. The Impala V6 was a fixture in police, taxi, and government fleets. Chevy was also first to adopt yellow fuel caps as an FFV identifier, beating the industry by two years in 2006.

For the current model year, Chevrolet's FFV lineup is the Silverado 1500 with the 5.3L V8, plus the Trailblazer and Trax crossovers with the 1.2L turbo three-cylinder — making Chevy one of the few places a new-car buyer can still walk into a dealer and order flex-fuel off the lot.

Chevrolet flex fuel models

Model	Year range	Engine	Notes
Silverado 1500	2002–present	5.3L V8; 4.3L V6 (2014–16); 4.8L V8 (2012–13); 6.2L V8 (2009–13)	Longest-running FFV in America
Silverado 2500 HD	2016 (limited)	6.0L Vortec V8	Rare FFV on HD
Tahoe	2002–2016	5.3L Vortec V8; 6.2L V8
Suburban	2002–2016	5.3L Vortec V8
Avalanche	2005–2013	5.3L Vortec V8
Express Van	2007–2016	5.3L V8; 6.0L V8; 4.8L V8	Fleet/commercial
Impala	2006–2016	3.5L V6; 3.9L V6; 3.6L LFX V6	Police/taxi favorite
Monte Carlo	2006–2007	3.5L V6
Malibu	2010–2013	3.5L V6; 2.4L I4	Primarily fleet
Equinox	2011–2016	3.0L V6; 2.4L I4; 3.6L V6
HHR	2009–2011	2.2L and 2.4L EcoTec I4	GM's first 4-cyl FFV
Uplander	2007–2008	3.9L V6	Minivan
Trailblazer (new)	2021–present	1.2L turbo I3	Current production
Trax (new)	2024–present	1.2L turbo I3	Current production

Chevrolet-specific E85 tips

The 5.3L V8 is the FFV engine to know.

Whether badged as a Vortec (2002–2013) or EcoTec3 (2014–present), this engine has been flex-fuel across Silverado, Sierra, Tahoe, Suburban, Avalanche, and Yukon for more than two decades. If you are shopping used and see a 5.3L half-ton from Chevy or GMC, it is almost certainly an FFV — confirm via the yellow gas cap and the VIN 8th-character code.

GM's virtual flex-fuel sensor works differently from Ford's.

Instead of a dedicated ethanol-content sensor in the fuel line, newer GM FFVs infer ethanol content from oxygen-sensor response patterns during closed-loop operation. The practical implication: if your O2 sensors are failing, ethanol adaptation can feel rough. A clean set of upstream sensors keeps E85 behavior smooth.

Watch for the 6.2L V8 FFV window.

From 2009 through 2014, GM's 6.2L V8 (L9H and L94) shipped as flex-fuel in Silverado, Tahoe, Sierra Denali, Yukon Denali, Cadillac Escalade, and the Avalanche-based Escalade EXT. Later 6.2L engines (L86, L87) in Silverado and Sierra trucks are not factory FFV. This matters if you are cross-shopping a used Denali or Escalade expecting E85 capability.

Current-generation Trailblazer and Trax offer a rare new-car FFV option.

Both use GM's 1.2L turbo three-cylinder, and both are flex-fuel certified from the factory for 2024, 2025, and 2026. For buyers who want a new, affordable, fuel-efficient FFV — not a truck — these two are effectively the only mainstream options on the market.