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Service bulletin 631106

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 id52585
Published by NHTSA1997-08-21
Manufacturer's number631106
Manufacturer's date1997-03-01
NHTSA componentVISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

NHTSA's summary

AIR LEAKING FROM I/P VENTS IN HEATER OR DEFROST MODES (REPLACE MODE VALVE VACUUM ACTUATOR; ADD CLIP TO HVAC MODULE CASE). *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

Glass, wipers and mirrors, Heating and air conditioning

Vehicles listed
CHEVROLET CAVALIER1996
PONTIAC SUNFIRE1996

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
030864011A2003-12-03. Service bulletin. MIRROR VIBRATES AT HIGHWAY SPEEDS. *TT
030864009A2003-12-03. Service bulletin. LEFT OUTSIDE BREAKAWAY MIRROR INOPERATIVE. *TT UPDATE. *TT
0227032003-07-23. Service bulletin. INOPERATIVE MANUAL OUTSIDE REARVIEW MIRROR(S). *TT *JB
9908640151999-11-23. Service bulletin. CONCERNS WITH THE LEFT HAND MANUAL MIRROR NOT ADJUSTING WHEN THE ADJUSTMENT LEVER IS MOVED. *TT
7315021997-08-21. Service bulletin. LEFT HAND MIRROR DOES NOT ADJUST WHEN ADJUSTMENT LEVER IS MOVED (ADJUST LEVER TO ALIGN WITH LEVER SLIDE). *TW