Chevrolet 1993 Astro Passenger Owner's Manual page 306

Service & Appearance Care
Service Replacement Parf and Filter
Recommendations Table
Engine
cap
Filter
Plugs
Valve
Cleaner Filter
(VIN)
Radiator Fuel
Spark"
PCV
Air
Oil
4.3L
(Z)
PF51 A773C
*Use copper-cored resistor type spark plugs.
RC36 GF481 .CR43TS CV892C
A1163C PF51
4.3L (W)
RC36 GF481
CR43TS CV789C
Filter
TO005
6-70