Spring, front, heavy duty

Years 1983–91, 1998–09, 2025–27 Models 16 Factory citations 67

Also described as Suspension, front, heavy dutySprings, front, heavy-duty (increased torsion bar rate)Spring, front, heavy-dutyHeavy duty front spring packageSprings, front, heavy duty

Also documented for Cadillac Chevrolet

Documented applications

Jimmy (full-size) — Square body (1983–1991)

1984–1986, 1990, 1991 Single-source

2250 lb each; includes heavy duty front and rear shock absorbers; for snowplow use (1984–1986) or front mounted accessories (1990–1991); shared square-body platform code; cited from the Chevrolet Blazer kit; 1991 rests on the Chevrolet-only 1991 Blazer book, so the row is single-source

GM Heritage factory kit — 1984 Chevrolet Blazer RV Full Size, p.19.
GM Heritage factory kit — 1985 Chevrolet Blazer RV Full Size, p.12.
GM Heritage factory kit — 1986 Chevrolet Blazer, p.13.
GM Heritage factory kit — 1990 Chevrolet Blazer, p.16.
GM Heritage factory kit — 1991 Chevrolet Blazer, p.16.

Jimmy — first generation (1983–1994)

1984–1989 Factory-verified

only in: 4WD; includes F51; recommended for snowplow and front mounted accessories; shared S/T platform code; cited from the joint S-10/15 Blazer/Jimmy pages of the S-10 Blazer kit

GM Heritage factory kit — 1984 Chevrolet S 10 Blazer, p.10.
GM Heritage factory kit — 1985 Chevrolet S 10 Blazer, p.15.
GM Heritage factory kit — 1986 Chevrolet S 10 Blazer, p.10.
GM Heritage factory kit — 1987 Chevrolet S 10 Blazer, p.45.
GM Heritage factory kit — 1988 Chevrolet S 10 Blazer, p.12.
GM Heritage factory kit — 1989 Chevrolet Blazer, p.19.

Sierra — GMT400 (1988–2000)

1998–2000 Factory-verified

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

Sierra — GMT800 (1999–2007)

1999–2007 Factory-verified

GM factory document — 1999 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)

2001–2007 Factory-verified

GM factory document — 2001 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2002 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.
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)

2007–2008 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.

Sierra HD — T1XX (2020–2027)

2025–2027 Factory-verified

the pickup guides print "Heavy Duty Front Spring/Camper Package"; Pro, SLE, SLT, AT4, Denali, Denali Ultimate: O; AT4X: not offered

GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide, p.45.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide, p.43.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide, p.41.

Sierra — Square body (1983–1991)

1984–1987 Factory-verified

shared platform code; cited from the square-body C/K pickup kits; the kit pages also print F6O

GM Heritage factory kit — 1984 Chevrolet Truck, p.47.
GM Heritage factory kit — 1985 Chevrolet Truck, p.45.
GM Heritage factory kit — 1986 Chevrolet Truck, p.156.
GM Heritage factory kit — 1987 Chevrolet Truck, p.60.

Sonoma — first generation (1982–1993)

1985–1989 Factory-verified

only in: 4WD; includes F51; shared S-series code; cited from the joint S-10/S-15 pages of the S-10 kits

GM Heritage factory kit — 1985 Chevrolet S 10, p.26.
GM Heritage factory kit — 1986 Chevrolet S 10, p.18.
GM Heritage factory kit — 1987 Chevrolet S 10, p.24.
GM Heritage factory kit — 1988 Chevrolet S 10, p.35.
GM Heritage factory kit — 1989 Chevrolet S 10, p.24.

Suburban — GMT400 (1992–1999)

1998–1999 Factory-verified

GM factory document — 1998 gmc gmc suburban 2wd rpo code list, p.1.
GM factory document — 1999 gmc gmc suburban 2wd rpo code list, p.1.

Suburban — Square body (1983–1991)

1983, 1985–1991 Single-source

2250 lb each; includes heavy duty front and rear shocks without Z75; for snowplow use or front mounted accessories; shared square-body platform code; cited from the Chevrolet Suburban kit; 1991 rests on the Chevrolet-only 1991 Suburban book, so the row is single-source

GM Heritage factory kit — 1983 Chevrolet Suburban, p.18.
GM Heritage factory kit — 1985 Chevrolet Suburban, p.20.
GM Heritage factory kit — 1986 Chevrolet Suburban, p.22.
GM Heritage factory kit — 1987 Chevrolet Suburban, p.27.
GM Heritage factory kit — 1988 Chevrolet Suburban, p.19.
GM Heritage factory kit — 1989 Chevrolet Suburban, p.17.
GM Heritage factory kit — 1990 Chevrolet Suburban, p.19.
GM Heritage factory kit — 1991 Chevrolet Suburban, p.19.

Vandura and Rally — Second generation G-series (1983–1996)

1983, 1984, 1986, 1988–1990 Factory-verified

1984 from the February 1984 data book pages in the mislabelled G-Van kit file; shared G-van platform code; cited from the Chevrolet G-Van kit

GM Heritage factory kit — 1983 Chevrolet Vandura, p.17.
GM Heritage factory kit — 1985 Chevrolet G Van, p.20.
GM Heritage factory kit — 1986 Chevrolet G Van, p.66.
GM Heritage factory kit — 1988 Chevrolet Vandura, p.23.
GM Heritage factory kit — 1989 Chevrolet G Van, p.6.
GM Heritage factory kit — 1990 Chevrolet G Van, p.8.

Yukon — GMT400 (1992–1999)

1998–1999 Factory-verified

GM factory document — 1998 gmc yukon 2wd rpo code list, p.1.
GM factory document — 1999 gmc yukon 2wd rpo code list, p.1.

Yukon — GMT800 (2000–2006)

2000–2006 Factory-verified

the 2000 list words it as provisions for an increased torsion bar rate

GM factory document — 2000 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2001 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2002 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2003 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2004 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2005 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2006 gmc yukon 2wd rpo code list, p.1.

Yukon — GMT900 (2007–2014)

2009 Factory-verified

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

This page aggregates every documented appearance of F60 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.