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Service bulletin 677156

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 id51318
Published by NHTSA1997-06-27
Manufacturer's number677156
Manufacturer's date1997-02-01
NHTSA componentVEHICLE SPEED CONTROL

NHTSA's summary

BUZZ OR MOAN NOISE DURING TCC APPLY (REPLACE SPACER PLATE AND UPPER CONTROL VALVE). *AK

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

Throttle and cruise control

Vehicles listed
CADILLAC DEVILLE1996, 1997
CADILLAC ELDORADO1996, 1997
CADILLAC SEVILLE1996, 1997
OLDSMOBILE AURORA1997

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
9674T80E011997-05-27. Service bulletin. BUZZ OR MOAN NOISE DURING TCC APPLY. *TW