Steering, power, non-variable ratio

Years 1983–90, 1998–09 Models 8 Factory citations 34

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Also described as Steering, power

Also documented for Buick Chevrolet Oldsmobile Pontiac Saturn

Documented applications

Canyon — GMT355 (2004–2012)

2004 Factory-verified

the lists print "Ration".

GM factory document — 2004 gmc canyon pickup 2wd rpo code list, p.1.

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 — 2009 gmc envoy 4wd rpo code list, p.1.

Jimmy — second generation (1995–2001)

1998–2001 Factory-verified

GM factory document — 1998 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 1999 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 2000 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 2001 gmc jimmy 4wd rpo code list, p.1.

Jimmy — first generation (1983–1994)

1983–1984, 1986–1988 Factory-verified

standard on 4WD in 1988; 1985 is left out: the power team names N40 only in requirement remarks and the 1985 option line is not legible; 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 — 1983 Chevrolet S 10 Blazer, p.9.
GM Heritage factory kit — 1984 Chevrolet S 10 Blazer, p.10.
GM Heritage factory kit — 1986 Chevrolet S 10 Blazer, p.9.
GM Heritage factory kit — 1987 Chevrolet S 10 Blazer, p.45.
GM Heritage factory kit — 1988 Chevrolet S 10 Blazer, p.12.

Safari — First generation (1985–1994)

1986, 1987 Factory-verified

requires the front stabilizer bar; shared M-body code; cited from the joint Astro/Safari pages of the Astro kits.

GM Heritage factory kit — 1986 Chevrolet Astro Van, p.15.
GM Heritage factory kit — 1987 Chevrolet Astro Van, p.29.

Sonoma — first generation (1982–1993)

1983–1990 Factory-verified

the 1984 page prints N4O; 1984 from the power team requirement remark; shared S-series code; cited from the joint S-10/S-15 pages of the S-10 kits

GM Heritage factory kit — 1983 Chevrolet S 10, p.29.
GM Heritage factory kit — 1984 Chevrolet S 10, p.8.
GM Heritage factory kit — 1985 Chevrolet S 10, p.25.
GM Heritage factory kit — 1986 Chevrolet S 10, p.17.
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.
GM Heritage factory kit — 1990 Chevrolet S 10, p.22.

Sonoma — second generation (1994–2004)

1998–2004 Factory-verified

GM factory document — 1998 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 1999 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2000 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2001 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2002 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2003 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2004 gmc sonoma pickup 4wd rpo code list, p.1.

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

1983, 1984, 1986, 1988 Factory-verified

standard on G20–G30; 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.

This page aggregates every documented appearance of N40 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.