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Service bulletins for the 2004 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.

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

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Bulletins, newest first
05080022005-09-01. Service bulletin. WHEELS. COLD TIRE CHARACTERISTICS OF THE MANUFACTURER GM ORIGINAL EQUIPMENT TIRES. *TT
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
05010052005-09-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. OIL LEAK UNDER EXTREME COLD TEMPERATURES. *TT
05060022005-09-01. Service bulletin. SUSPENSION. RATTLE, CLUNK, POP, SNAP NOISE FROM FRONT AND/OR REAR SUSPENSION WHILE DRIVING OVER ROUGH, UNEVEN, WASH BOARD ROAD SURFACES. *TT
05090022005-08-17. Service bulletin. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER. REVISED FRONT BRAKE CALIPER BRACKET MOUNTING BOLT FASTENER TIGHTENING SPECIFICATION (SERVICE MANUAL REVISION). *TT
05110042005-08-16. Service bulletin. EXTERIOR LIGHTING. EXTERIOR LAMP CONDENSATION AND REPLACEMENT GUIDELINES. *TT
05040032005-08-16. Service bulletin. ELECTRICAL SYSTEM. DIAGNOSTIC INFORMATION ON HEADLAMPS FLICKER OR MOMENTARILY DIM WHILE DRIVING. *TT DIAGNOSTIC INFORMATION TO CLARIFY EFFECT OF SECONDARY AIR INJECTION SYSTEM ON HEADLAMP FLICKER. *TT
05090032005-08-16. Service bulletin. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER. REVISED REAR BRAKE CALIPER BRACKET MOUNTING BOLT FASTENER SPECIFICATION (SERVICE MANUAL REVISION). *TT *SC
05050072005-08-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). GUIDELINES FOR REPLACEMENT OF TRANSFER CASE CONTROL MODULE (TCCM). *TT
05100012005-07-08. Service bulletin. STEERING. STEERING SYSTEM MOAN, GROAN, SHUDDER AND/OR VIBRATION TYPE NOISE DURING LOW SPEED TURNING MANEUVERS. *TT
05110022005-07-08. Service bulletin. STRUCTURE:BODY. THE CENTER HIGH-MOUNT STOP LAMP (CHMSL) APPLIQUE IS LOOSE ON THE LIFT-GATE GLASS. *TT
0506040212005-05-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. REVISED INSPECTION/MAINTENANCE (I/M) EVAPORATIVE EMISSION (EVAP) SYSTEM SET PROCEDURE. *TT
05130022005-05-10. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. BUZZ TYPE NOISE COMING FROM REAR SPEAKERS. *EH
05130012005-05-10. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. BOSE RADIO MAY HAVE POOR FIDELITY. *EH
05110032005-05-10. Service bulletin. VISIBILITY:REARVIEW MIRRORS/DEVICES. OUTSIDE REARVIEW MIRROR VIBRATION. *EH
05010012005-05-10. Service bulletin. ENGINE AND ENGINE COOLING. UNABLE TO RESET ENGINE OIL LIFE MONITOR. *EH
05030012005-05-10. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. REVISED INSPECTION MAINTENANCE EVAPORATIVE EMISSION SYSTEM SET PROCEDURE. *EH
05110082005-05-10. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW. RECONNECTION OF REAR WINDOW DEFROSTER CONTACT OR TAB. *EH
05110022005-05-10. Service bulletin. STRUCTURE:BODY:DOOR. DOOR HARD TO CLOSE. *EH
05130022005-05-10. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. COMPACT DISC PLAYER SKIPPING INOPERATIVE SLUGGISH AND OR LONG SEARCH TIMES. *EH
05130012005-05-10. Service bulletin. ELECTRICAL SYSTEM. ERROR CODES ON RADIO DISPLAY THEIR CAUSE AND CORRECTIVE ACTION. *EH
05120022005-05-10. Service bulletin. ELECTRICAL SYSTEM. AUTOMATIC DUAL ZONE HVAC BATTERY DRAW. *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
05110022005-05-10. Service bulletin. VISIBILITY:GLASS, SIDE/REAR. DISTORTIOPN IN OUTER SURFACE OF VEHICLE GLASS. *EH
05050042005-05-10. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SHIFT STABILIZATION FEATURE FOR HYDRAMATIC 4L60E TRANSMISSION. *EH

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