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Service bulletins for the 2003 Isuzu Ascender

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.

173 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Heating and air conditioning are shown. Show all

Bulletins, newest first
05120022005-09-01. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. INTERMITTENT SLOW TO COOL HVAC PERFORMANCE CONCERNS IN HIGH AMBIENT TEMPERATURES AND/OR HIGH HUMIDITY CONDITIONS AFTER START UP, ESPECIALLY AT LOW ENGINE SPEEDS. *TT
05110082005-05-10. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW. RECONNECTION OF REAR WINDOW DEFROSTER CONTACT OR TAB. *EH
05120012005-05-10. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. INTERMITTENT A/C PERFORMANCE CONCERNS IN HIGH AMBIENT TEMPERATURES AND OR HIGH HUMIDITY CONDITIONS ESPECIALLY AT LOW ENGINE SPEEDS. *EH FINAL RELEASE. *TT
0312S0012005-04-22. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. A/C INOPERATIVE/INTERMITTENT, A/C BLOWS WARM AIR. *TT
0412S0012004-05-07. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. REVISED MODE ACTUATOR REPLACEMENT PROCEDURE (SERVICE MANUAL REVISION). *TT
0412S0042004-05-07. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. REAR HEATER & AIR CONDITIONING (A/C) PIPE REPLACEMENT/REPAIR. *TT
0412S0032004-05-07. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. J44551 AIR CONDITIONER SUCTION SCREEN KIT REPAIR RECOMMENDATIONS AND PROCEDURES AFTER COMPRESSION FAILURES. *TT
0412S0022004-04-16. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. CERTAIN HVAC CONTROL HEAD MODULES ARE NOT REPROGRAMMABLE. *TT
0301390132004-03-02. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. REVISED MODE ACTUATOR REPLACEMENT PROCEDURE. *TT
0312S0012003-10-03. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. DIAGNOSING POOR AIR CONDITIONER PERFORMANCE, AIR CONDITIONER STOPS BLOWING COLD, AIR CONDITIONER CYCLES ON AND OFF. *TT

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.