Engine, 7.4 liter Vortec 7400 V8, sequential fuel injection

Years 1965, 1998 Models 2 Factory citations 2

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Also described as 194 cid I6

Documented applications

C/K Trucks

1965 Factory-verified

Base six, lightest models

GM Heritage factory kit — 1965 Chevrolet Truck, p.19.

Motor Home chassis (1983–1998)

1998 Factory-verified

only in: CP32012 heavy duty motor home (21,000 and 22,500 lb GVWR, with the Allison MT9)

GM Heritage factory kit — 1998 Chevrolet Motorhome, p.6.

This page aggregates every documented appearance of L21 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.