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Service bulletin 98-227

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 id601894
Published by NHTSA1998-08-28
Manufacturer's number98-227
Manufacturer's date1998-06-19
NHTSA componentSERVICE BRAKES, HYDRAULIC

NHTSA's summary

SUBJECT ON SPECIAL RETURN, POWER BRAKE BOOSTERS. *YC

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

Brakes

Vehicles listed
GMC GM

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