C4M Factory-verified

GMC · Regular Production Option

GVW rating, 9,900 lbs (4 500 kg)

Years 2004–09, 2014–18, 2022–27 Models 6 Factory citations 27

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Also described as GVW rating, 9,900 lbs (4,500 kg)GVW rating, 9,900 lbGVWR, 9,900 lbs (4490 kg)

Also documented for Chevrolet

Documented applications

Savana — GMT610 (2003–2027)

2014–2018, 2022–2027 Factory-verified

the 2025–2027 guides read GVWR, 9900 lbs. (4490 kg); S: Cutaway 1WT (2027), Cutaway TG33503 (2025–2026), Cutaway TG33803 (2025–2026); O: Cargo TG33705, Passenger TG33706; not offered: Cargo TG23405, Cargo TG23705, Cargo TG33405, Cutaway 2WT (2025–2026), Cutaway TG33903 (2025–2026), Passenger TG23406, Passenger TG33406

GM factory document — 2014 chevrolet gh van elec bbm si brief, p.6.
GM factory document — 2018 chevrolet 18 express savana bodybuilders sm 2017nov06, p.15.
GM factory document — 2022 chevrolet 22 express savana electrical body builder sm en us 2021oct12, p.12.
GM factory document — 2025 chevrolet my25 express savana electrical bbm, p.11.
GM factory document — 2025 gmc savana cargo fleet order guide, p.32.
GM factory document — 2025 gmc savana cutaway fleet order guide, p.40.
GM factory document — 2025 gmc savana passenger fleet order guide, p.24.
GM factory document — 2026 chevrolet my26 express savana electrical bbm, p.11.
GM factory document — 2026 gmc savana cargo fleet order guide, p.34.
GM factory document — 2026 gmc savana cutaway fleet order guide, p.43.
GM factory document — 2026 gmc savana passenger fleet order guide, p.26.
GM factory document — 2027 gmc savana cargo fleet order guide, p.31.
GM factory document — 2027 gmc savana cutaway fleet order guide, p.22.
GM factory document — 2027 gmc savana passenger fleet order guide, p.24.

Sierra — GMT800 (1999–2007)

2004–2007 Factory-verified

2005–2007: heavy-duty models only (GM’s HD list)

GM factory document — 2004 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2007 gmc sierra classic 2wd rpo code list, p.1.

Sierra — GMT900 (2007–2013)

2009 Factory-verified

GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.

Sierra HD — GMT800 (2001–2007)

2004–2007 Factory-verified

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.
GM factory document — 2006 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2007 gmc sierra classic 2wd rpo code list, p.1.

Sierra HD — GMT900 (2007–2014)

2007–2009, 2014 Factory-verified

2014: only in the 2500 guide

GM factory document — 2007 gmc sierra 2wd rpo code list, p.1.
GM factory document — 2008 gmc sierra 2wd rpo code list, p.1.
GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.
GM factory document — 2014 gmc sierra 2500hd fleet order guide wayback, p.4.

Sierra HD — K2XX (2015–2019)

2015, 2018 Factory-verified

with the 6.0L V8; only in: 2500HD (the 2015 3500HD guide does not list it); 2015 marks: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide

GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.3.

This page aggregates every documented appearance of C4M in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.