Wheel, spare, full size, steel

Years 1985–89, 2002–09, 2015, 2018–19 Models 7 Factory citations 16

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Also described as Wheel, spare, full sizeWheel, spare, 18 x 8 full-size, steel

Also documented for Buick Cadillac Chevrolet Oldsmobile

Documented applications

Envoy — GMT360 (2002–2009)

2002–2009 Factory-verified

GM factory document — 2002 gmc envoy 2wd rpo code list, p.1.
GM factory document — 2005 gmc envoy 2wd rpo code list, p.1.
GM factory document — 2008 gmc envoy 2wd rpo code list, p.1.
GM factory document — 2009 gmc envoy 4wd rpo code list, p.1.

Jimmy — first generation (1983–1994)

1985–1989 Factory-verified

cast aluminum spare with N90 wheels; 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 — 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.46.
GM Heritage factory kit — 1988 Chevrolet S 10 Blazer, p.11.
GM Heritage factory kit — 1989 Chevrolet Blazer, p.20.

Sierra — GMT900 (2007–2013)

2009 Factory-verified

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

Sierra HD — GMT900 (2007–2014)

2009 Factory-verified

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

Sierra HD — K2XX (2015–2019)

2015, 2018–2019 Factory-verified

with 18 or 20 inch wheels; 2015 marks: Sierra, SLE: O; SLT: included in the trim group; 2015 3500HD: Sierra, SLE, SLT: S; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide

GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.7.
GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.2.

Sonoma — first generation (1982–1993)

1988 Factory-verified

with ZJ7 rally wheels; shared S-series code; cited from the joint S-10/S-15 pages of the S-10 kits

GM Heritage factory kit — 1988 Chevrolet S 10, p.36.

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 N79 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.