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Service bulletins for the 2020 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.

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

By type

By component

Bulletins, newest first
SS3082FTL20212021-07-22. Service bulletin. FUEL SYSTEM, GASOLINE. Service Solution for New Cascadia Fuel Sending Unit Connector Loose.
SS3081FTL20212021-07-22. Service bulletin. LANE DEPARTURE; FORWARD COLLISION AVOIDANCE. Service Solution for VRDU Fault Code 232/524000/19and 232/524049/19 – ECU CPC Data Error. This VRDU code typically sets after the VRDU gets reprogrammed and parameters to clear out. To prevent this from happening in the future, follow the programming guide laid out in SB 54-308.Parameter changes during flashing can occur if the programming steps are not followed.
CALFTL91-0022021-07-21. Service bulletin. SEATS. Customer Advisory Letter for Replacement of Sears Driver Seat Metal Mounting Clip to Eliminate Seat Sensor Chaffing Issue. The seat sensor harness on New Cascadia vehicles ordered with a Sears driver seat (sales code 756-1H2) may experience chaffing due to the incorrect mounting of a metal clip edge;
CALFTL54-0172021-07-21. Service bulletin. LANE DEPARTURE. Customer Advisory Letter for New Cascadia Side Radar Wiring Harness Inspection. If the wiring harness is not routed properly, harness chaffing may occur on certain New Cascadia vehicles equipped with Detroit Assurance 5.0 Side Guard Assist
CALFTL60-0042021-07-03. Service bulletin. STRUCTURE; VISIBILITY. Customer Advisory Letter for P4 cab mirror line of sight.
SF6222021-06-29. Service bulletin. SERVICE BRAKES, HYDRAULIC. Field Service Campaign for Cascadia/49X ABS MBSP+ Controller Software Update. Certain vehicles have a WABCO Anti-Lock Braking System (ABS) controller that logs excessive 629-11 fault codes which subsequently lead to additional downstream fault codes.
SB54-3342021-06-29. Service bulletin. FORWARD COLLISION AVOIDANCE; ENGINE AND ENGINE COOLING. Freightliner Service Bulletin for Detroit Assurance 4.0 Software v20.05. New Cascadia trucks built from January 1, 2017 through September 9, 2019 and equipped with Detroit Assurance correctly initiate an active brake assist (ABA) event when a vehicle or obstacle is detected in front of the truck. Some of those trucks may continue decelerating to a complete stop, even after the vehicle or obstacle detected in front of the Detroit Assurance-equipped truck has moved away.
SB54-3382021-06-29. Service bulletin. VISIBILITY. Updated Freightliner Service Bulletin for Updating HVAC ECU Software to Fix Front HVAC Evaporator Freezing and Improve Espar Heater Cool Down. This bulletin replaces the version dated 03/03/2021. Information on software versions and the number of software updates needed has been updated.
SS36722021-06-10. Service bulletin. UNKNOWN OR OTHER. SAM Cab & SAM Chassis Wall Charts
SS37042021-06-10. Service bulletin. ELECTRICAL SYSTEM. Cascadia Fault codes 6.0
SS4690762021-06-10. Service bulletin. UNKNOWN OR OTHER. Odometer racks up mileage when the vehicle is stationary - Cascadia
SS10230692021-06-09. Service bulletin. UNKNOWN OR OTHER. Cascadia - Engine Will Not Crank (No Starter Output from SAM Cab)
SS10329742021-06-09. Service bulletin. UNKNOWN OR OTHER. SS 1032974 High Oil Pressure on 2017 DTNA Vehicles Instrument Cluster Display
SS10330472021-06-09. Service bulletin. UNKNOWN OR OTHER. Service Solution SS 1033047 M2 Battery Drain Problem – Mismatched I...
SS10331212021-06-09. Service bulletin. ELECTRICAL SYSTEM. SS 1033121 Adding a Fan Override Switch (Legacy Cascadia)
SS10330942021-06-09. Service bulletin. FUEL SYSTEM, GASOLINE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:MANIFOLD PRESSURE (MAP) SENSOR. Service Solution SS 1033094 KUS Float Tube Fuel Level Sensor Inform...
SS10331982021-06-09. Service bulletin. ELECTRICAL SYSTEM. Service Solution SS 1033198 P4 New Cascadia Refrigerator Power Supp...
SS10334522021-06-09. Service bulletin. ELECTRICAL SYSTEM. SS1033452 Setting the time in the ICUC (New Cascadia)
SS10334822021-06-09. Service bulletin. ELECTRICAL SYSTEM. SS1033482: Trailer Stop lamp activation w/ hand valve (parameter configuration) - P4 New Cascadia
SS10335232021-06-09. Service bulletin. SUSPENSION. Service Solution SS 1033523 Airliner Suspension Dump and Raise Functionality and Troubleshooting
SS10336382021-06-09. Service bulletin. ELECTRICAL SYSTEM. SS 1033638 - Power Window Express Down Module Discontinued
TechTalk5669502021-06-03. Service bulletin. UNKNOWN OR OTHER. Tech Talk Discussion SPN 520981 FMI 5 HOOD TILT SWITCH CURRENT BELOW NORMAL OR OPEN CIRCUIT
TechTalk5667712021-06-03. Service bulletin. SERVICE BRAKES, AIR; ELECTRICAL SYSTEM; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC). Tech Talk Discussion P4 New Cascadia ABS Fault Code 520247/31 - Failure Memory Bit (ESC) Condition Exists
TechTalk357822021-06-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Tech Talk discussion on J1939 datalink failure codes.
CALFTL42-0042021-05-26. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; SERVICE BRAKES, HYDRAULIC. Customer Advisory Letter for Drive Axle Drum Brake S-Cam U-Bolt Replacement.

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