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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
WP21-0072021-03-24. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Warranty Policy Letter for battery tags. DTNA determined that since adopting the AutoMeter BCT-460DTNA Powernet Assessment Tool (AutoMeter) as the required powernet system tester, not all battery tags have to be retained support Warranty-related claims.
sb542982021-03-15. Service bulletin. ENGINE. sb54298 GHG17 Heavy Duty Engine Platform Vehicle Dash Oil
sb35322021-03-15. Service bulletin. STRUCTURE. sb3532 Detroit Drive Axle Identification and Lubrication
0806-172021-03-15. Service bulletin. EQUIPMENT. 0806-17 SPN 101 (MCM)(GHG17)
0805-172021-03-15. Service bulletin. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:THERMAL MANAGEMENT:FLUID/COOLANT. 0805-17 Contaminated Fluids
0803-172021-03-15. Service bulletin. EQUIPMENT. 0803-17 SPN 411 (MCM) (GHG17)
0802-172021-03-15. Service bulletin. EQUIPMENT. 0802-17 SPN 521485 (TCM)
0801-172021-03-15. Service bulletin. ENGINE AND ENGINE COOLING. 0801-17 Symptom Diagnostics: Coolant Loss
17TS12Rev12021-03-15. Service bulletin. ENGINE. 17TS12Rev1 GHG17 Heavy Duty Engine Platform 1-BOX? Aftertreatment System ATS Wire Harness
17CSA162021-03-15. Service bulletin. EQUIPMENT. 17CSA16 Release of DiagnosticLink® 8.06 Service Pack 1
TechTalk80962021-03-03. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on 3226/20 Fault code always came back.
TechTalk81282021-03-03. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Tech Talk discussion on GHG 17 SOFTWARE UPDATE FOLLOWED BY NO START.
TechTalk81532021-03-03. Service bulletin. ELECTRICAL SYSTEM. Tech Talk discussion on New Cascadia Dump Switch not working.
TechTalk81652021-03-03. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on CPC not flashing. Keeps crashing even with new CPC.
TechTalk48552021-03-02. Service bulletin. VISIBILITY; ELECTRICAL SYSTEM. Tech Talk continued discussion for P4 Next Gen Cascadia dome lights stay on while driving.
TechTalk32852021-03-02. Service bulletin. FORWARD COLLISION AVOIDANCE; LANE DEPARTURE. Tech Talk continued discussion on Detroit Assurance Radar Picking Up Overhead Signs.
WI21-0042021-03-02. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. Warranty Information Letter for Detroit Resources: Exploded View DD Platform and DT12 Posters. Detroit's TechComm team created visual aids for the network and released exploded view posters for DD platform engines. In early 2021, Detroit added multiple DT12 posters.
ICI21-005 D19M72021-03-02. Service bulletin. ENGINE AND ENGINE COOLING. Important Campaign Information Letter announcing that a revision for Detroit Diesel Field Service Campaign D19M7. This letter is to inform you that Detroit Field Service Campaign D19M7 REV2, Pre-Series Cascadia Emission Label Replacement has been EXTENDED for an additional four months and re-activated on DTNA Connect. Please use the extended termination date for all work under D19M7 REV2 from this point forward.
D19M7REV22021-03-02. Service bulletin. ENGINE AND ENGINE COOLING. Revision for Field Service Campaign for pre-series Cascadia and New Cascadia Emission Label replacement. Additional sections have been updated.
TechTalk68332021-03-02. Service bulletin. POWER TRAIN. Tech Talk discussion on p4 dt12 not going into gear.
P4HALOGENUPDATE2021-03-02. Service bulletin. VISIBILITY; ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Customer Maintenance Enhancements for the P4 Halogen Lamp replacement procedure.
21OEM-062021-03-01. Service bulletin. ENGINE AND ENGINE COOLING. Starting on November 23, 2020, DiagnosticLink 8.13 (Build 4527) was made available. Current subscribers of DiagnosticLink 8.11 or 8.12 may upgrade to DiagnosticLink 8.13 at no cost. All DTNA Service shops & OEM locations are required to maintain the latest version of software on each of their stations.
SS10348842021-02-27. Service bulletin. ELECTRICAL SYSTEM. Service Solution for P4 New Cascadia Unintended Dome Lamp Activation Due To Poor Connections at the sSAM.
SS10348672021-02-27. Service bulletin. SEAT BELTS. Service Solution for New Cascadia Seat Belt Warning Harness Routing
SS10347612021-02-27. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Service Solution for P3 - CEL On and Engine de-rate due to ATD Chassis Harness Circuit 532M5+ at DEF Heater Supply location is shorted.

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