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Service bulletin 631109

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 id51246
Published by NHTSA1997-06-27
Manufacturer's number631109
Manufacturer's date1997-01-01
NHTSA componentVISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

NHTSA's summary

AIR COMING FROM I/P VENT WHILE IN HEATER MODES OR A DELAY OCCURS WHEN CHANGING TO A NEW MODE SETTING (DIAGNOSE/MODIFY/REPLACE). *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

Glass, wipers and mirrors, Heating and air conditioning

Vehicles listed
BUICK SKYLARK1996, 1997
OLDSMOBILE ACHIEVA1996, 1997
PONTIAC GRAND AM1996, 1997

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
6310511997-06-27. Service bulletin. LEFT REAR DOOR POWER WINDOW INTERMITTENTLY INOPERATIVE/COMPLETELY INOPERATIVE (SECURE CONNECTOR WITH TIE STRAP). *TW