LT1 Service Parts & Supersessions
Service replacement, original production part and “fits an LT1” are not the same claim.
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Thermostat
12555290
Earlier service numbers 10128336 / 10223370 → 12555290.
Water pump
12518277 → 12527741
Platform trap: B-body 12527740 is not treated as the F-body service number simply because it is an LT1 water pump.
Ignition coil
1994–95: 10477208
1996–97: 19418996
1993 is not listed here; confirm the exact 1993 application before ordering.
These service-part records are listed by the F-body year/application shown. If a production breakpoint is not listed, identify the original part and vehicle application before ordering.
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These are service/application records, not proof that a particular number was installed on every car at the assembly plant. Supersession means the later service number replaces the earlier service number in the service record.
LT1 fuel pressure →LT1 injector diagnosis →