Chevrolet Cavalier 1996 — technical service bulletin
Bulletin 631106 · NHTSA communication 52585 · issued Mar 1, 1997
Technical service bulletin
communication type
Visibility
component
1996
model years
2
vehicle entries
Official summary
Air leaking from i/p vents in heater or defrost modes (replace mode valve vacuum actuator; add clip to hvac module case). *ak
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.