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Service bulletin 56093A

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id39491
Published by NHTSA1995-11-01
Manufacturer's number56093A
Manufacturer's date1993-08-01
Replaces5-60-93
NHTSA componentFUEL SYSTEM, GASOLINE

NHTSA's summary

NEW PRO-CHEK FUEL SYSTEM CHECK VALVE RELEASED FOR SERVICE. *TW

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Fuel system

Vehicles listed
DETROIT DETROIT
DETROIT DIESEL DETROIT

Listing a model year does not mean every vehicle of it is concerned: the document says which.