Wiring harness, light duty, trailer, five wire

Years 1982–84, 1986–94, 1998–05 Models 4 Factory citations 28

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Also described as Wiring harness, 5-lead

Also documented for GMC Oldsmobile

Documented applications

Astro — First generation (1985–1994)

1986, 1987 Factory-verified

included with Z72.

GM Heritage factory kit — 1986 Chevrolet Astro Van, p.14.
GM Heritage factory kit — 1987 Chevrolet Astro Van, p.27.

Blazer — S-10 second generation (1995–2005)

1998–2005 Factory-verified

2001 list reads car trailer. The 2000 2WD and 4WD lists print UB1 in this position (light duty trailer wiring harness) and have no U89 line; the 2000 right-hand-drive list prints U89.

GM factory document — 1998 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 1999 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2000 chevrolet blazer 4wd rhd rpo code list, p.1.
GM factory document — 2001 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2002 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2003 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2004 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2005 chevrolet blazer 4wd rpo code list, p.1.

S-10 pickup — First generation (1982–1993)

1982–1984, 1986–1993 Factory-verified

not with Z82 (1982–1983, 1986–1989, 1991–1993)

GM Heritage factory kit — 1982 Chevrolet S 10, p.8.
GM Heritage factory kit — 1983 Chevrolet S 10, p.31.
GM Heritage factory kit — 1984 Chevrolet S 10, p.18.
GM Heritage factory kit — 1986 Chevrolet S 10, p.15.
GM Heritage factory kit — 1987 Chevrolet S 10, p.22.
GM Heritage factory kit — 1988 Chevrolet S 10, p.19.
GM Heritage factory kit — 1989 Chevrolet S 10, p.36.
GM Heritage factory kit — 1990 Chevrolet S 10, p.30.
GM Heritage factory kit — 1991 Chevrolet S 10, p.22.
GM Heritage factory kit — 1992 Chevrolet S 10, p.22, p.34.
GM Heritage factory kit — 1993 Chevrolet S 10, p.10.

S-10 pickup — Second generation (1994–2004)

1994, 1998–1999, 2001–2004 Factory-verified

2001 list reads car trailer; the 2002–2004 lists read as the 2001 list. The 2000 lists print UB1 in this position (light duty trailer wiring harness) and have no U89 line.

GM factory document — 1998 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 1999 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2001 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2002 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2003 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2004 chevrolet s10 pickup 4wd rpo code list, p.1.
GM Heritage factory kit — 1994 Chevrolet S 10, p.16.

This page aggregates every documented appearance of U89 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.