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Service bulletins for the 2009 Kenworth T300

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.

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

By type

By component

By trouble code

Bulletins, newest first
42-0702026-10-17. Service bulletin. UNKNOWN OR OTHER. Due to supplier constraints, an authorized aftermarket surge tank has been made available.
P0012026-09-29. Service bulletin. ENGINE. "Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes. 2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR weekly for VIN changes. 10 chassis added to the chassis list."
02-1602021-03-10. Service bulletin. VISIBILITY; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; VISIBILITY:WINDSHIELD WIPER/WASHER. Information Only – Windshield washer pumps have a high No Trouble Found rate. Washer pumps may fail to spray due to a clogged filter.
32-0152020-07-03. Service bulletin. ELECTRICAL SYSTEM. Information Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.
34-0852020-04-03. Service bulletin. VEHICLE SPEED CONTROL; ELECTRICAL SYSTEM. Information Only – Vehicles may have the connector seals on the wheel speed sensor incorrectly installed, which may lead to water intrusion and corrosion in some vehicles.
32-0162020-04-03. Service bulletin. EQUIPMENT. Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
01-0752019-12-04. Service bulletin. ENGINE AND ENGINE COOLING. Information Only: This bulletin provides guidance for repairing an air-conditioning system after internal failure of the A/C compressor.
SB-E-0492012-05-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ERRONEOUS FAULT CODES MAY DEVELOP IN CHASSIS OR CHECK ENGINE WARNING LIGHT RELATED TO NOX EMISSIONS MEASUREMENT AND AFTERTREATMENT IF IMPROVEMENT FOR THE RECALIBRATION OF ENGINE CONTROL MODULE (ECM) IS LEFT UNCORRECTED. *PE
TIB-34-0392011-09-02. Service bulletin. SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY:U-BOLT, LEAF SPRING TO AXLE. PACCAR SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. INFORMATION ON THE FRONT DRIVE AXLE SPEED WARNING DISPLAY. *RM
TIB-E-0302011-08-29. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING. PACCAR SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER.CAMPAIGN TO REPLACE THE WATER PUMP. *RM
TIB-03-0412011-08-24. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. KENWORTH SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE ODOMETER MAY INACCURATELY RECORD MILEAGE. THE FOG LAMP CIRCUIT MAY NOT WORK WITH THE INSIDE SWITCH. SOME CHASSIS HAVE INACCURATE CHASSIS WEIGHT ON THE DOOR LABEL. *RM
TIB-42-482011-08-16. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. PACCAR: INFORMATION ON PREMATURE FAN CLUTCH LINING WEAR. *RM
TIB-42-0432011-08-16. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. PACCAR: INFORMATION ON FAN HUB BEARINGS INSPECTION AND WARRANTY EXTENSION DUE TO A HIGHER THAN NORMAL FAILURE RATE. *RM
TIB-41-0142011-08-16. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. PACCAR: THERE ARE COOLING MODULES THAT MAY HAVE A LOOSE CONNECTION AT THE CHARGE AIR COOLER MOUNTING. *RM
TIB-02-1132011-08-12. Service bulletin. SEATS. PACCAR INC: FIRE TRUCK SEAT HEIGHT SPECIFICATION CHANGE. *RM
43-0202011-06-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. PACCAR: THE CHASSIS NEEDS TO HAVE PRODUCTION PARTS INSTALLED AND PRE-PRODUCTION PARTS REMOVED. *RM
TIB-E-0102011-01-05. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. KENWORTH SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. PACCAR PX-6 AND PX- 8 ENGINE SOFTWARE AND AFTERTREATMENT UPDATES. THE IDENTIFIED CHASSIS REQUIRE A PRODUCT IMPROVEMENT INVOLVING RECALIBRATION OF THE ENGINE CONTROL MODULE (ECM) AND THE AFTERTREATMENT DIESEL EXHAUST FLUID (DEF) CONTROLLER. SOME VEHICLES REPAIRS MAY ALSO INCLUDE REPLACING VARIOUS AFTERTREATMENT SYSTEM COMPONENTS. CSC LETTER HAS BEEN RECEIVED. *PE
TIB-E0022010-09-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. KENWORTH: FUEL. PX8 ENGINE FUEL PUMP HEAD CAMPAIGN. (CUMMINS C1009) CERTAIN TRUCKS EQUIPPED WITH PX8 ENGINES, REQUIRE A PRODUCT IMPROVEMENT INVOLVING INSPECTIONS AND POSSIBLE REPLACEMENT OF THE FUEL PUMP HEAD. FAILURE TO PERFORM THIS REPAIR MAY RESULT IN VEHICLES DEVELOPING AN EXTERNAL FUEL LEAK, WHICH MAY CAUSE HARD START COMPLAINT AND POSSIBLE FAULT CODES FOR LOW FUEL PRESSURE. *PE
TIB-02-1082010-09-25. Service bulletin. SEATS. KENWORTH TRUCK: BENCH SEAT CAMPAIGN. A SINGLE OCCUPANT SENSOR WAS INSTALLED IN TWO PERSON BENCH SEATS. DEPENDING UPON WHERE A PASSENGER(S) SITS, THE SENSOR MAY INDICATE THERE ARE NO PASSENGERS OR IT WILL INDICATE THERE ARE TWO PASSENGERS. THE SENSOR WILL NOT INDICATE A SINGLE PASSENGER. *PE
TIB-34-342010-04-26. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS:CONCEALMENT DEVICES; EXTERIOR LIGHTING:HEADLIGHTS. KENWORTH TRUCKS: HEADLIGHT MOISTURE REPAIRS. BEADS OF MOISTURE OR POOLING WATER VISIBLE THROUGH THE HEADLIGHT LENSES. INSPECT FOR MISSING HEADLIGHT VENT AND/OR ROCK SHIELD AND REPAIR AS NECESSARY. *PE
TIB-26-172010-04-16. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION. KENWORTH TRUCK SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE OIL SLINGER THREADS ON INPUT SHAFTS OF IDENTIFIED 10 SPEED TRANSMISSION WERE MACHINED INCORRECTLY. THIS DEFECT WILL CREATE A SLOW FLUID LEAK AT THE INPUT SHAFT TO TRANSMISSION INTERFACE. CSC LETTER WAS REC'D. *PE
TIB-99-132010-04-14. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. KENWORTH TRUCK SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. TRANSMISSION DRIVER INSTRUCTIONS MANUAL CAMPAIGN. THE WRONG EATON TRANSMISSION DRIVER INSTRUCTIONS MANUAL MAY HAVE BEEN DELIVERED WITH IDENTIFIED CHASSIS. *PE

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