Sales package, combination electric tailgate release and rear window defogger

Years 1989, 1998–01 Models 2 Factory citations 5

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Also documented for Chevrolet Oldsmobile

Documented applications

Jimmy — second generation (1995–2001)

1998–2001 Factory-verified

1998–1999 lists read package, combination

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)

1989 Factory-verified

the joint data book names it the rear window convenience package; 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 — 1989 Chevrolet Blazer, p.15.

This page aggregates every documented appearance of ZM8 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.