Conversion, natural gas (CNG)

Years 1997–08 Models 6 Factory citations 18

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Also described as Vehicle, dedicated gaseous fuel packageVehicle package, dedicated gaseous fuel

Also documented for Chevrolet

Documented applications

Savana — GMT600 (1996–2002)

2001–2002 Factory-verified

only in: CNG

GM factory document — 2001 gmc savana cng rpo code list, p.1.
GM factory document — 2002 gmc savana cng rpo code list, p.1.

Savana — GMT610 (2003–2027)

2003–2005 Factory-verified

the 2003–2005 main lists read Conversion, Natural Gas; the 2003–2005 CNG lists read Vehicle: Dedicated Gaseous Fuel Package

GM factory document — 2003 gmc savana rpo code list, p.1.
GM factory document — 2003 gmc savana cng rpo code list, p.1.
GM factory document — 2005 gmc savana rpo code list, p.1.
GM factory document — 2005 gmc savana cng rpo code list, p.1.

Sierra — GMT400 (1988–2000)

1997–2000 Factory-verified

only in: CNG

GM factory document — 1997 gmc gmc c pickup 2wd cng rpo code list, p.1.
GM factory document — 1998 gmc gmc c pickup 2wd cng rpo code list, p.1.
GM factory document — 1999 gmc gmc c pickup 2wd cng rpo code list, p.1.
GM factory document — 2000 gmc gmc c pickup 2wd cng rpo code list, p.1.

Sierra — GMT800 (1999–2007)

2001–2006 Factory-verified

2005: heavy-duty models only (GM’s HD list); the 2001 list says propane but marks it CNG; KL7 is the propane conversion; the CNG/LPG supplement lists (2001–2006) word it as a dedicated CNG gaseous fuel package; 2002, 2006 only in those lists

GM factory document — 2001 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2006 gmc gmc c sierra 2wd cng rpo code list, p.1.

Sierra HD — GMT800 (2001–2007)

2001, 2003–2005 Factory-verified

the 2001 list says propane but marks it CNG; KL7 is the propane conversion

GM factory document — 2001 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2003 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2004 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2005 gmc gmc c sierra 2wd rpo code list, p.1.

Sierra HD — GMT900 (2007–2014)

2007–2008 Factory-verified

GM factory document — 2007 gmc sierra 2wd rpo code list, p.1.
GM factory document — 2008 gmc sierra 2wd rpo code list, p.1.

This page aggregates every documented appearance of KL8 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.