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Service bulletins for the 2013 Kenworth T680

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.

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

By type

By component

Bulletins, newest first
34-0722019-01-07. Service bulletin. EQUIPMENT. Information: J1939 CAN BUS Best Practices
32-0102018-05-21. Service bulletin. ELECTRICAL SYSTEM:WIRING; ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. Information only - Customer installed inverters may be wired incorrectly.
34-0602017-10-12. Service bulletin. ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; TRAILER HITCHES. Non Safety Campaign: The circuit for the Trailer Hotline/Trailer Power may not be properly protected on Model T680/T880 vehicles equipped with this option.
43-0482017-10-12. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Fix-As-Fail: Repair for horizontal exhaust diffuser configurations with broken brackets or cracked diffuser.
41-0162017-03-27. Service bulletin. EQUIPMENT; ENGINE. NON-SAFETY CAMPAIGN: REPLACE THE MOLDED AIR INTAKE PIPE, WHICH CAN CRACK AND ALLOW ROAD DEBRIS INTO THE ENGINE. DEBRIS ENTERING THROUGH THE INTAKE MAY CAUSE SEVERE ENGINE DAMAGE.
16-0382017-02-18. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. NON-SAFETY CAMPAIGN: WATSON & CHALIN LIFT AXLE FRAME BRACKETS WITH SLOTTED LOWER MOUNTING HOLES MAY EXHIBIT CRACKING WHEN FASTENERS ARE POSITIONED AT THE UPPER PORTION OF THE SLOT. INSTALLING A DOUBLER PLATE MAY PREVENT CRACKS FROM DEVELOPING. FOR VEHICLES WHERE CRACKING IS EVIDENT, A NEW UPDATED SIDE PLATE WILL BE INSTALLED.
01-0682017-02-18. Service bulletin. EQUIPMENT. FIX-AS-FAIL: AN INTERNAL ISSUE MAY CAUSE SOME HVAC MODE DOOR ACTUATORS TO FAIL. THIS WILL CAUSE THE HVAC SYSTEM TO ACT ERRATICALLY OR CONSTANTLY TURN ON AND OFF.
27-0262017-02-18. Service bulletin. ENGINE. FIX-AS-FAIL - ENGINE OVER-SPEED LAMP COULD COME ON AFTER A DOWNSHIFT WITH THE EATON ULTRASHIFT PLUS TRANSMISSION. THIS DOES NOT AFFECT THE FUNCTION OF THE VEHICLE.
04-0172017-02-17. Service bulletin. EQUIPMENT. FIX-AS-FAIL: THE HEAT-STAKE MOUNTING STUDS USED TO RETAIN THE FIXED PANEL COVER CAN FATIGUE. THIS COULD RESULT IN THE FORWARD CHASSIS FAIRING PANEL BECOMING LOOSE AND RATTLING.
TIB-01-0632015-06-27. Service bulletin. EQUIPMENT. KENWORTH: SOME TRUCKS SLEEPER HEATERS ARE EXPERIENCING A LEAKAGE FROM SLEEPER HEATER CORE O RING COOLANT. MODEL 2012-13 T680, T880. *PE
TIB-E-1012014-11-22. Service bulletin. EQUIPMENT:OTHER:LABELS. KENWORTH: A CERTIFIED EPA/CARB LABEL MUST REPLACED THE PREVIOUS TEST EXEMPTION EPA/CARB LABEL, WHICH WILL EXPIRE. MODEL 2013-2013 T680, T880. *PE
TIB-23-0012014-10-29. Service bulletin. POWER TRAIN:CLUTCH ASSEMBLY:PEDAL/HAND LEVER(MOTORCYCLE). KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. DUE TO DEVELOPING BORATE SALT CRYSTALS FROM A BATCH OF DOT4 FLUID, CAUSING A BLOCKAGE IN CLUTCH MASTER CYLINDER AND NOT ABLE TO COMPRESS CLUTCH OR POOR PEDAL FEEL. MODEL 2013 T680, 880. *PE UPDATED 1/6/15. *PE
TIB-26-0252014-10-29. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. DURING ASSEMBLY, OIL SUPPLY LINE HAD NOT BEEN PROPERLY SEATED AND RESULTED IN OIL PRESSURE TO BEARINGS BEING REDUCED. MODEL 2014 T680. *PE
TIB-14-0242014-08-15. Service bulletin. FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY; EQUIPMENT. KENWORTH: ON SOME TRUCKS, CROSS BRACE AND FUEL TANK WILL CONTACT DUE TO INSUFFICIENT CLEARANCE AND NEED TO REPLACE, AND REMOVE, CROSS BRACE, AND IF ANY DAMAGE TO FUEL TANK, REPLACE. MODEL T680. *PE
TIB-34-0532014-08-15. Service bulletin. EXTERIOR LIGHTING. KENWORTH: WHILE DRIVING SOME TRUCKS, THE COMBINATION OVERDOOR LAMP WILL FLICKER AND DEFECTIVE LAMPS WILL NEED TO BE REPLACED. MODEL T680. *PE
TIB-13-0372014-08-15. Service bulletin. EQUIPMENT. KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ON SOME TRUCKS, THE AIR DRYER BRACKET WILL CRACK AND BECOME LOOSE, RESULTING IN FAILURE. MODEL T680. *PE
TIB-02-1302013-09-10. Service bulletin. STRUCTURE. KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. INFORMATION CONCERNING THE UNDER CAB CLOSEOUTS. EXHAUSTS CAN CONTACT DPF HARNESS. THIS CAN CAUSE A FAULT CODE OR THE VEHICLE TO GO IN TO LIMP MODE DEPENDING ON THE SEVERITY OF THE INTERFERENCE. THIS INCLUDES VEHICLES BUILT BEFORE 07/09/2013. *JS
TIB-02-1312013-09-10. Service bulletin. STRUCTURE; VISIBILITY. KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SOME VEHICLES MAY EXPERIENCE A MALFUNCTION WITH THE SUN VISOR. THE SUN VISOR MAY FLUTTER IN CERTAIN CONDITIONS. THIS CAN CAUSE THE ROOF PANELS TO CRACK. *JS
TIB-34-0492013-08-15. Service bulletin. ELECTRICAL SYSTEM:WIRING; ELECTRICAL SYSTEM:SOFTWARE. KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SOFTWARE NEEDS TO BE UPDATED (P30-1011-108), DUE TO RECALLED REMOVAL AND DISABLING OF 13KWB, TO FIX PRE TRIP LIGHT INSPECTION FUNCTION ISSUE AND REINSTALL SWITCH. MODELS 2013 T680, T880. *PE
E0652013-04-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. MX RC5-RC14 SOFTWARE UPDATE CAMPAIGN. SOFTWARE UPDATES ARE SAID TO BENEFIT THE ENGINES IN RC5 AND RC14 KENWORTH ENGINES. PACCAR/KENWORTH. *KB
TIB-34-0432012-09-29. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:SOFTWARE. KENWORTH: CERTAIN TRUCKS HAVE ISSUES WITH DOOR MODULE WAKE UP, MIRROR JITTERINESS AND HEAD AND PARK LAMPS SWITCH POSITIONS TIED TOGETHER. MODEL 2012 T680. *PE
TIB-02-1202012-09-27. Service bulletin. SEATS. KENWORTH: TESTING PROCEDURES SHOWS C- SCISSOR LINKAGE EXHIBITED EXCESSIVE RELATIVE MOTION AND INSTALLING NON CRITICAL SUPPORT BRACKET TO MINIMIZE RELATIVE MOTION OF C- SCISSOR LINKAGE. MODELS 39 QV AND VV T680S.. NO MODEL YEARS LISTED.
TIB-34-0422012-07-28. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. KENWORTH: ON SOME TRUCKS, COMMUNICATION ISSUES LOGGED BY ECU, MAY CAUSE INSTRUMENT PANEL TO EXPERIENCE SWEEPING GAUGE NEEDLES, ENGINE FAULT CODES RELATED TO J1939 AND WARNING LIGHTS WOULD COME ON. *PE

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