2020 Freightliner Cascadia Technical Service Bulletins

661 technical service bulletins (TSBs) are on record for the 2020 Freightliner Cascadia. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11035536Jul 21, 2026Forward collision avoidance. Truck Equipment Manufacturer upfit guide for Detroit Assurance Forward Radar Relocation and Adjustment
• 11034519Jun 18, 2026Exterior lighting. CX Advocate for Utility Lamp water intrusion
• 11033103May 8, 2026Transmission and drivetrain. Revised Technical Service Bulletin for DT12 OVX Transmission Refresh
• 11031981Apr 16, 2026Lane departure. CX Advocate for P4 Side Guard Assist On/Off Menus and Trailer Functionality (TSB-54-381-FTL)
• 11029512Feb 6, 2026Fuel system. My Communications for update on UFU R61709 Fuel Filters
• 11028073Jan 26, 2026Transmission and drivetrain. Revised Technical Service Bulletin for DT12 Excessive Wear
• 11028063Jan 22, 2026Transmission and drivetrain. Technical Service Bulletin for DT12 Excessive Wear
• 11028061Jan 15, 2026Other or unknown. Technical Service Bulletin for Cascadia Generations
• 11028062Jan 6, 2026Transmission and drivetrain. Technical Service Bulletin for DT12 PTO Upfit
• 11027503Dec 11, 2025Steering. Fleet Communications for Power Steering Resevoir - NTF Replacements
• 11027502Dec 11, 2025Transmission and drivetrain. Fleet Communications for Detroit Axle NFD ALM to Passive Lube Management
• 11027500Dec 11, 2025Transmission and drivetrain. Fleet Communications for NFD Lower Oil Plug Location - SP Axles
• 11027497Dec 11, 2025Transmission and drivetrain. Fleet Communications for Detroit NFD Axle - Factory Fluid Change
• 11027493Dec 11, 2025Engine. Fleet Communications for Heater Core Plugging
• 11026469Nov 20, 2025Electrical system. Fleet Communication for SS 3174-FTL
• 11026454Nov 20, 2025Electrical system. Fleet Communications for Key off amp draw
• 11026453Nov 20, 2025Engine. Fleet Communications for Power Steering Reservoir Fill Cap Venting
• 11026421Nov 19, 2025Engine. Fleet Communications for Low Coolant Sensor
• 11026420Nov 19, 2025Steering. Fleet communications for Bosch Steering Gear Replacements
• 11024979Oct 30, 2025Fuel system. My Communications for Update to DTNA parts on UFU R61709
• 11024978Oct 29, 2025Lane departure, Forward collision avoidance. Features and Benefits for SafetyDirect 5.1
• 11024972Oct 23, 2025Visibility (wipers, defrost, mirrors). Service Solution for P4 Main Mirror Arm Covers Loose - Falling Off
• 11025094Oct 16, 2025Brakes. CX Advocate for Experiencing Excessive Purging from Air Dryer
• 11024962Oct 16, 2025Engine. CX Advocate for P4, WST X-Series, DD Engines Low/Critical Low Coolant Warnings
• 11024958Oct 16, 2025Engine. CX Advocate for ConMet Oil Pan Insert Additional Issues
• 11023665Sep 12, 2025Brakes. My Communications for Parts Alert ABS Harness
• 11023657Sep 5, 2025Fuel system. Revised Parts Bulletin for Cascadia 23-inch Diameter Fuel Tanks
• 11023660Sep 2, 2025Fuel system. My Communications for UFI 0-Ring Announcement
• 11022338Aug 21, 2025Forward collision avoidance. CX Advocate for KY AEB Notice
• 11022333Aug 21, 2025Fuel system. My Communications for UPDATE TO DTNA PARTS QUALITY ALERT STOCK HOLD on UFU R61709
• 11022332Aug 18, 2025Fuel system. My Communications for Parts Hold on UFU Filter
• 11022314Aug 8, 2025Forward collision avoidance. Customer letter for Detroit Assurance Kentucky Interstate 71 Road Hazard
• 11021242Jul 28, 2025Wheels. Revised Technical Service Bulletin for Hub Oil Level in Final Drive (NFD) Top Performance Axles on Decked Vehicles
• 11020273Jun 11, 2025Steering. Parts Bulletin for Tie Rod Assembly Part Breakdown
• 11017555Apr 30, 2025Transmission and drivetrain. Service Solution for DT12 Oil Plug Ports
• 11017537Apr 23, 2025Electrical system. Service Solution for ICC5 Erroneous Electric Power Steering Warning Message
• 11017549Apr 18, 2025Other or unknown. Features and Benefits for Detroit Connect UpfrontService Extension
• 11017548Apr 18, 2025Other or unknown. Features and Benefits for Detroit Connect Base Service Renewal
• 11017529Apr 17, 2025Electrical system. CX Advocate for ICC5 erroneous electric power steering warning message (SS3176-FTL)
• 11016335Mar 31, 2025Electrical system. Service Solution for ICC5 Erroneous Electric Power Steering Warning Message
• 11016328Mar 26, 2025Other or unknown. Technical Service Bulletin for Load Dump Switch Inspection and Installation on Dometic Refrigerators
• 11016310Mar 20, 2025Steering. CX Advocate for SAS01T to SAS03T replacement (TSB54-373-FTL, TSB54-097-WST)
• 11016309Mar 20, 2025Engine. CX Advocate for NOx conversion low faults
• 11016315Mar 12, 2025Electrical system. Service Solution for ICC5 B-Panel Gauges Intermittently Not Being Displayed
• 11014819Feb 20, 2025Engine. CX Advocate for turbo oil drain cracking
• 11014818Feb 20, 2025Engine. CX Advocate for NOx conversion low faults
• 11014786Feb 10, 2025Engine. My Communications for Variable Speed Coolant Pump for DD13 Engines - Cascadia/57X Only
• 11014775Feb 5, 2025Engine. Technical Service Bulletin for GHG17 and Newer DD Platform Heavy Duty Oil Pan Drain Plug Inserts
• 11014785Feb 4, 2025Steering. Technical Service Bulletin for SAS01T to SAS03T Replacement Information
• 11014781Feb 4, 2025Transmission and drivetrain. DT12 OVX Transmission Refresh

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