A/C - Slow Defrost of Windshield
Group Ref.: HVACBulletin No.: 331222A
Date: December, 1993
SUBJECT:
SLOW DEFROST OF WINDSHIELD (INSTALL NEW DEFROSTER NOZZLE AND/OR NOZZLE SEAL)
MODELS:
1991-93 CHEVROLET CAVALIER
1992-93 PONTIAC SUNBIRD
THIS BULLETIN IS BEING REVISED TO CORRECT A PART NUMBER IN THE CORRECTION PROCEDURE.
CONDITION:
Some owners of the above vehicles may express concern about the time it takes the defroster to clear the windshield. This condition is most prevalent under very cold conditions.
CAUSE:
The seal between the I/P and the HVAC module may not be thick enough. This could allow defroster air to escape below the I/P pad and not reach the windshield. CHEVROLET ONLY - Also, the vanes in the defroster nozzle assembly may not be directing the optimum supply of air to the windshield.
CORRECTION:
Pontiac Only:
Replace the current 12 mm windshield defrost nozzle and air distribution seal with the new 23 mm seal, P/N 22594128.
Affected Vehicles:
1992 - S.O.P. to E.O.P.
1993 - S.O.P. to Lordstown Ramos
P7584932 PS835281
Chevrolet Only:
1. Replace defroster nozzle assembly with P/N 22593234.
Affected Vehicles:
1991-1993 - S.O.P. to E.O.P.
2. Replace the current 12 mm windshield defrost nozzle and air distribution seal with the new 23 mm seal, P/N 22594128.
Affected Vehicles:
1992 - S.O.P. to E. 0. P.
1993 - S.O.P. to Lordstown Ramos
P7315356 PS835231
SERVICE INFORMATION:
Follow service procedures outlined in Section 8C of the appropriate service manual.
NOTE:
The I/P carrier does not need to be completely removed from the vehicle to gain access to the defroster nozzle or the defroster nozzle seal.
PARTS INFORMATION:
Pontiac Only:
Seal, w/s defrost nozzle and air distribution:
P/N 22594128
Chevrolet Only:
Grille, w/s defrost nozzle - left: P/N 22593234
Seal, w/s defrost nozzle and air distribution: P/N 22594128
Parts are currently available from GMSPO.
WARRANTY INFORMATION:
Labor Operation Number: T3374
Labor Time: 2.2 HRS. - Pontiac Only
Labor Time: 2.6 HRS. - Chevrolet Only
Trouble Code: 92