Fuel system, bi-fuel, compressed natural gas (CNG), 17 GGE tank at the front of the pickup box

Years 2014–15 Models 2 Factory citations 2

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Also described as Fuel system, bi-fuel, compressed natural gas

Also documented for Chevrolet

Documented applications

Sierra HD — GMT900 (2007–2014)

2014 Factory-verified

only in: 2500 crew cab with LC8

GM factory document — 2014 gmc sierra 2500hd fleet order guide wayback, p.4.

Sierra HD — K2XX (2015–2019)

2015 Factory-verified

runs on gasoline and CNG, not E85 compatible; tank in the forward end of the bed; requires the gaseous 6.0L V8 (LC8); Sierra, SLE, SLT: O

GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.

This page aggregates every documented appearance of FHV in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.