Heavy Duty Chassis Equipment

Years 1963–79, 1995–96 Models 4 Factory citations 5

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Also described as Heavy duty chassisPolice car equipmentZ26 package

Documented applications

Chevelle / El Camino

1965 Factory-verified

GM Heritage factory kit — 1965 Chevrolet Chevelle, p.4.
GM Heritage factory kit — 1965 Chevrolet El Camino, p.31.

Impala / Full-Size

1963–70s (varies) Confirmed

Nova / Chevy II

1963 Factory-verified

GM Heritage factory kit — 1963 Chevrolet Nova, p.9.

Beretta — L-body (1987–1996)

1995–1996 Factory-verified

the 1995–1996 power teams pages give the Z26 as 1LV37 with Z04, while the order guides list the Z26 as model 1LW37; the 1996 vehicle-models page prints Z0A; the rparts GM RPO PDF reads Z04 as the GTZ conversion (1LV37 plus Z04 gives 1LZ37)

GM Heritage factory kit — 1995 Chevrolet Beretta, p.21.
GM Heritage factory kit — 1996 Chevrolet Beretta, p.55.

This page aggregates every documented appearance of Z04 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.