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Service bulletin 566305

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 id45817
Published by NHTSA1996-04-25
Manufacturer's number566305
Manufacturer's date1995-08-01
NHTSA componentFUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

NHTSA's summary

VEHICLE DOES NOT START READILY UPON CRANKING (REPLACE FUEL PUMP RELAY). *SD

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, Fuel pump

Vehicles listed
CHEVROLET ASTRO1993 to 1994
CHEVROLET BLAZER1994
GMC SAFARI1993, 1994
OLDSMOBILE BRAVADA1994

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

Other bulletins for the same vehicles and component
6663091997-07-24. Service bulletin. ENGINE HARD TO START (REPLACE FUEL PUMP PULSATOR). *TW