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Service bulletins for the 1999 GMC T-Series

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.

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

By type

By component

By trouble code

Bulletins, newest first
0306040142003-04-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. OIL PRESENT AROUND TURBO AREA, OIL LEVEL LOW, OIL PRESSURE GAUGE MAY DROP. *TT
0206040602003-03-28. Service bulletin. ENGINE AND ENGINE COOLING. AUTOMATIC ENGINE SHUTDOWN FEATURE. *TT
0208640202003-02-12. Service bulletin. STRUCTURE:BODY:DOOR. PASSENGER DOOR OUTSIDE REARVIEW MIRROR VIBRATION ON CERTAIN VEHICLES INCLUDING THE 2000 - 2001 WT500 SERIES MEDIUM DUTY TILT CAB MODELS. *TT
020062002-11-09. Service bulletin. POWER TRAIN:CLUTCH ASSEMBLY. THIS MESSAGE ANNOUNCES RECALL 02006 REGARDING A CONDITION IN WHICH THE CLUTCH MASTER CYLINDER PUSH ROD END THAT ATTCHES TO THE CLUTCH PEDAL PIN MAY WEAR TO THE POINT OF NOT PERFORMING AS INTENDED. *TT
000138005A2002-10-11. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. SOME CUSTOMERS MAY COMMENT ABOUT INSTABILITY OF THE A/C CONDENSER OR THAT THE A/C SYSTEM IS INOPERATIVE. *TT
0207300172002-10-10. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. CONCERN WITH NO SHIFT, HARSH SHIFT, NO ENGAGEMENT, TRANSMISSION IN DEFAULT, CHECK TRANSMISSION WARNING INDICATOR ILLUMINATED, RANGE INHIBITED INDICATOR ILLUMINATED, TRANSMISSION DIAGNOSTIC TROUBLE CODES SET ON F-MODEL MEDIUM DUTY TILT CAB MODELS. *TT
0202320102002-10-10. Service bulletin. STEERING:HYDRAULIC POWER ASSIST:PUMP. SUBJECT REGARDING POWER STEERING PUMP NOISE ON F MODEL MEDIUM DUTY TILT CAB MODELS WITH ISUZU 7.8L DIESEL ENGINE. *TT
020523001A2002-10-09. Service bulletin. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS. SOME CUSTOMERS AND DEALERS MAY COMMENT ON ACCELERATED UNEVEN BRAKE PAD WEAR ON SOME VEHICLE WITH FOUR-PISTON FIXED CALIPER REAR DISC BRAKES. *TT
0206010242002-10-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. ON CERTAIN VEHICLES, SUCH AS THE CHEVROLET AND GMC WT 5500 MEDIUM DUTY TILT CAB MODELS, THE ENGINES MAY EXPERIENCE ROCKER ARM DAMAGE OR ROCKER BRIDGE DAMAGE FOLLOWING OVERHAUL OF THE CYLINDER HEAD IF THE VALVE BRIDGE STUD INSTALLED DEPTH IS INCORRECT. *TT
02006A2002-09-28. Service bulletin. POWER TRAIN:CLUTCH ASSEMBLY. SUBJECT REGARDING RECALL 02006A REVISION - CLUTCH MASTER CYLINDER PUSHROD WEAROUT. *TT
0206030022002-06-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. CUSTOMERS MAY COMPLAIN THAT THE ENGINE WILL NOT START. *JG
0206030022002-05-21. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. CUSTOMERS MAY COMPLAIN THAT THE ENGINE WILL NOT START. *SLC
0201370022002-04-02. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. SUBJECT REGARDING SERVICE DIAGNOSIS/RECOMMENDATIONS FOR INOPERATIVE AIR CONDITIONING SYSTEMS. *TT
0206040062002-04-02. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME CUSTOMERS MAY COMMENT ON SERVICE ENGINE SOON LAMP ON, MALFUNCTION INDICATOR LAMP ILLUMINATIONS INTERMITTENTLY, DIAGNOSTIC TROUBLE CODE SET, BLOWN FUSES, AND ENGINE WILL NOT START. *TT
0202320042002-04-02. Service bulletin. STEERING:HYDRAULIC POWER ASSIST SYSTEM. SUBJECT REGARDING STEERING GEAR GREASE SEEPAGE FROM AROUND SECTOR (OUTPUT) SHAFT (INSTALL NEW SECTOR (OUTPUT) SHAFT SEALS).*JG
0205230012002-03-25. Service bulletin. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:PADS. SOME CUSTOMERS AND DEALERS MAY COMMENT ON ACCELERATED UNEVEN BRAKE PAD WEAR ON F6-7 MEDIUM DUTY TILT CAB MODELS AND H6-7 CONVENTIONAL MEDIUM DUTY MODELS. *TT
000601023A2002-03-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. INFORMATION USED WHEN DIAGNOSING NOISE CONDITIONS SUCH AS ENGINE RATTLE NOISE, SPARK KNOCK AT 2000 - 2500 RPM RANGE, UNDER A MODERATE TO HEAVY LOAD WITH A WARMED UP ENGINE. *TT
99066D2002-03-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME OWNERS MAY EXPERIENCE A SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE ORHARD START DUE TO A DEPOSIT BUILD-UP ON THE SEQUENTIAL CENTRAL PORT FUEL INUJECTOR (SCPI) POPPET VALVE(S). *TT
000604003A2002-03-22. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME CUSTOMERS MAY COMMENT ON ROUGH IDLE AFTER START UP, ESPECIALLY AFTER SETTING OVERNIGHT. *TT
0107310032002-03-21. Service bulletin. POWER TRAIN:CLUTCH ASSEMBLY. CONCERNS ABOUT A SLIPPING CLUTCH OR EARLY CLUTCH FAILURE. *TT
010604037B2002-02-25. Service bulletin. FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP. INFORMATION REGARDING FUEL TRANSFER PUMP INOPERATIVE. *YH
0104200052002-02-15. Service bulletin. POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT:SEAL. INFORMATION REGARDING CORRECT VEHICLE APPLICATION FOR EATON. 1990-2002 CHEVROLET AND GMC C-SERIES CONVENTIONAL AND T-SERIES TILT CAB MEDIUM DUTY MODELS. *YH
0106020112002-02-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. INFORMATION REGARDING CHEVROLET AND GMC 6-7F MEDIUM DUTY TILT CAB MODELS WITH ISUZU DIESEL ENGINE, ENGINE OVERHEATS, TEMPERATURE GAUGE READS HOT, AUDIBLE WARNING ALARM SOUNDS, AND CHECK GAUGE LAMP ON. *YH
0108630012001-11-19. Service bulletin. STRUCTURE:BODY:HOOD:HINGE AND ATTACHMENTS. SUBJECT ON HOOD HINGE RATTLE COMING FROM EITHER OR BOTH FRONT CORNERS OF THE INSTRUMENT PANEL NEAR THE HOOD HINGE AREAS FOR 1995 - 2002 PICKUP AND UTILITY MODELS. *ET
0106040392001-11-01. Service bulletin. ELECTRICAL SYSTEM. SOME VEHICLES MAY EXHIBIT A SERVICE ENGINE SOON LAMP ON, MALFUNCTION INDICATOR LAMP ILLUMINATES INTERMITTENTLY, ANTI-LOCK BRAKE SYSTEM WARNING LIGHT ILLUMINATED, DIAGNOSTIC TROUBLE CODES SET, AND / OR BLOWN FUSES. *TT

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