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Service bulletins for the 2018 Freightliner Cascadia

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.

1044 on file from NHTSA, as of 2026-10-19.

By type

By component

Bulletins, newest first
SB54-3332020-07-30. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Service Bulletin for Installing a Fog Lamp Backshell. The connector that attaches to the fog lamp is exposed to water spray from the front tires. Even though the connector is sealed, water spray, in addition to wiring that may be pulled sideways, can cause water intrusion into the connector. A backshell can be added to the connector to provide shielding from direct water spray. It also provides strain relief for the wires entering the connector.
20CSA-092020-07-28. Service bulletin. ENGINE AND ENGINE COOLING. Customer Service Announcement for DiagnosticLink Software Update Reminder. Due to various software changes and fixes, vehicles will require DiagnosticLink 8.12 to perform functional programming. Failure to use this version may cause errors, incomplete programming, and poor vehicle performance. Because of this, all DiagnosticLink 8.09 installed versions will be disabled as of Thursday, July 23, 2020.
SS10347582020-07-28. Service bulletin. EQUIPMENT:ELECTRICAL; VISIBILITY. Service Solution for New Cascadia Window Regulator Motor Stop Working. The window regulators motors are not designed to be run continuously. The window regulator motors have a thermal cutoff. If they are run long enough, there will eventually be an open circuit and get a fault code.
SF6112020-07-28. Service bulletin. EQUIPMENT. Field Service Campaign for Cascadia CTP Reset. Certain vehicles equipped with DTNA's proprietary Common Telematics Platform (CTP) are not communicating and, therefore, are unable to benefit from over-the-air software updates. The CTP will be reset and some will also be initialized.
SB60-1712020-07-28. Service bulletin. STRUCTURE:BODY:DOOR. Service Bulletin for Guidelines for Cleaning and Disinfecting Cab Surfaces. The following guidelines are for cleaning and disinfecting commonly touched surfaces on the inside and outside of a vehicle. For best results, follow cleaning and disinfecting procedures fully and consistently. Ensure there is adequate ventilation when using chemicals. NOTICE: Wipe down fragile components carefully to avoid damaging the vehicle.
SB31-0442020-07-28. Service bulletin. VISIBILITY. Service Bulletin for Reflective Tape Installation. If a truck tractor is ordered without mudflaps and/or mudflap support brackets, the rear reflective tape applied to the mudflaps or mudflap brackets during production is delivered loose with the vehicle. FMVSS/CMVSS 108 S5.7.1.4.3 requires reflective tape on all truck tractors domiciled in the United States and Canada.
SB54-3302020-07-02. Service bulletin. ENGINE AND ENGINE COOLING. Freightliner Service Bulletin for Compressor Bracket Modification to Reduce Harness Chafing. New Cascadia vehicles with Detroit HDEP engines may experience engine harness chafing at the harness support bracket that mounts on the air compressor. To avoid this issue, a new hole is drilled on the bracket to enhance the spacing with tie straps and reduce harness contact with the mounting bolt. Additional harness wrapping is added to reduce the harness chafing.
SB31-0412020-07-02. Service bulletin. LATCHES/LOCKS/LINKAGES; STRUCTURE:BODY:DOOR:HINGE AND ATTACHMENTS. Service Bulletin for Chassis Side-Fairing Kickplate Magnet Replacement. On Freightliner Cascadia and New Cascadia vehicles manufactured before May 20, 2019, and equipped with side-fairings, the magnets that hold the kickplate closed may corrode and prevent the kickplate from staying in the closed position.
20CSA-082020-06-26. Service bulletin. ENGINE AND ENGINE COOLING. Customer Service Announcement for Release of DiagnosticLink 8.12. On Wednesday, June 10, 2020, DiagnosticLink 8.12 will be made available for download from the ordering system. Current subscribers of DiagnosticLink 8.xx can upgrade to DiagnosticLink 8.12 at no cost. All DTNA service shops are required to maintain the latest version of software on each of their stations.
20TS-03REV2020-06-26. Service bulletin. ENGINE AND ENGINE COOLING. Revised Technical Service Letter for DD Heavy Duty Platform Belt Tensioner Change. A newly designed, dual-arm friction shoe damping tensioner was implemented for the DD Heavy Duty Platform.
ICI20-0182020-06-26. Service bulletin. EQUIPMENT. Important Campaign Information for SF576 Revised Bulletin. This letter is to inform you that a revised bulletin for Field Service Campaign SF576 Freightliner Cascadia cTP/TDC Update is available on DTNAConnect. Please print and use the revised bulletin for all work under FL847 from this point forward. REVISION: New campaign groups have been added, the SRTs have been updated, the termination date has been extended, and work instructions have been updated to include an initialization.
SF576REV32020-06-26. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; COMMUNICATION. Revised Field Service Campaign sent out to customers to fix Common Telematics Platform (cTP), and Truck Data Center (TDC) communication issues. Certain vehicles built with DTNA's proprietary Common Telematics Platform (CTP), and Truck Data Center (TDC) are not communicating or have outdated software that cannot be updated and, therefore, are unable to benefit from over-the-air software updates.
SF6102020-06-26. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; COMMUNICATION; EQUIPMENT. Field Service Campaign for Cascadia CTP Initialization. Certain vehicles equipped with DTNA's proprietary Common Telematics Platform (CTP) are not communicating and, therefore, are unable to benefit from over-the-air software updates. The CTP will be initialized.
CALFTL54-0102020-06-26. Service bulletin. SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT; SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT. Customer Advisory Letter for New Cascadia ABS Warning Light Illumination work instructions. Due to the enhanced vigilance of the New Cascadia ABS controller, some fault codes and indicator lights do not necessarily require immediate maintenance attention. DTNA and WABCO are currently jointly working on a long-term corrective plan for the condition.
CALFTL42-0022020-06-26. Service bulletin. SERVICE BRAKES, AIR; SERVICE BRAKES, HYDRAULIC. Customer Advisory Letter for Antilock Brake System (ABS) Modulator Valve Replacement work instructions.
CALABSMODVALVE12020-06-26. Service bulletin. SERVICE BRAKES, HYDRAULIC; SERVICE BRAKES, AIR. Customer Advisory Letter for ABS Modulator Valve Replacement. Provides additional information as announced in CALABSMODVALVE communication.
SS10347402020-06-26. Service bulletin. ELECTRICAL SYSTEM. Service Solution for CTP Reset Warning When Using DiagnosticLink Version 8.12. Starting with DiagnosticLink version 8.12, a new Common Telematics Platform (cTP) Not Communicating Over the Air symptom based Advanced Diagnostic procedure was released with the intent to resolve specific issues on a certain population of trucks. Please, do not run this procedure unless specifically directed by a DTNA field service representative, or by the Detroit Connect support team.
SB60-1702020-06-13. Service bulletin. EQUIPMENT. Service Bulletin for Wear Pad Installation. The area of the floor mat near the throttle pedal is more prone to wear. To extend the life of a floor mat, a wear pad can be installed on it near the throttle and brake pedal area.
20TS-032020-05-23. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. Technical Service Letter for DD Heavy Duty Platform Belt Tensioner Change. A newly designed, dual-arm friction shoe damping tensioner was implemented for the DD Heavy Duty Platform.
SB49-0412020-05-23. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL. Service Bulletin for Remote-Fill DEF Tank Fill Port Torque Value and Required Lubricant. Some New Cascadia vehicles with chassis fairings have remote-fill Diesel Exhaust Fluid (DEF) tanks which have new instructions to replace the remote fill hose and fitting. Proper torque value is critical, as the remote-fill fittings are plastic and can easily crack if overtightened. The gasket on the fill fitting is sensitive to improper installation, and can get pinched, resulting in a DEF leak.
CALFTL54-0072020-05-23. Service bulletin. ELECTRICAL SYSTEM. Customer Advisory Letter for Cab-to-Chassis Redundant Ground Strap Installation - FTL Service Bulletin 54-318. Our records indicate that you are the owner of certain vehicles, and DTNA has decided to share the following documentation with you. On New Cascadia vehicles Penske/Black Horse units built prior to May 23, 2019, cab wiring can be damaged with an incorrect ground location or loose ground connections. This can result in inoperable LIN bus-related steering wheel switches, cruise control dropout, poor AM/FM radio reception, and an inoperable steering wheel clockspring. Installing a redundant ground strap from the main ground junction block (MGJB) to the frame will protect the vehicle from unexpected loss of cab grounding, and restore proper operation of the steering wheel switches, the radio, and the steering wheel clockspring.
CALFTL20-0022020-05-23. Service bulletin. POWER TRAIN:AXLE HUBS. Customer Advisory Letter for Cummins X12N E-Viscous BorgWarner Improved Fan Hub Replacement. Our records indicate that you are the owner of a Freightliner New Cascadia powered by a Cummins ISX12NG Engine. DTNA has decided to remove and replace the BorgWarner fan hub assembly to prevent any premature failures.
CALABSMODVALVE2020-05-14. Service bulletin. SERVICE BRAKES, AIR; SERVICE BRAKES, HYDRAULIC. Customer Advisory Letter for ABS Modulator Valve Replacement. DTNA has decided to remove and replace the ABS modulator valves as part of an ongoing supplier quality study.
SB60-1642020-04-29. Service bulletin. EXTERIOR LIGHTING. Service Bulletin for Marker Light Gasket Leaks, New Cascadia. This bulletin replaces the version dated June 17,2019. A procedure has been added for inspection, repair, and replacement of damaged or spun rivet nuts.
WI20-0082020-04-28. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Warranty Information Letter for Warranty Training Online. DTNA is pleased to announce the release of new Warranty-related training videos. The videos provide Warranty content in short instructional videos that are available on demand through the AftermarkeTV Video Channel icon on the Aftermarket Resource Center (ARC) home page.

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