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Service bulletins for the 2015 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.

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

By type

By component

Bulletins, newest first
Techtalk80552021-02-03. Service bulletin. SERVICE BRAKES; SERVICE BRAKES, AIR. Discussion on Cascadia brakes holding on
TechTalk80002021-02-02. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Tech Talk discussion on Cascadia Engine Brakes Not working.
WI21-0012021-01-26. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. Warranty Information Letter for Detroit New Service Replacement Engine SRT Update. While validating Standard Repair Times (SRTs) for Detroit's new Gen 5 engine series, DTNA discovered an error in a pre-Gen 5 SRT for the New Service Replacement Engine Program. As a result, DTNA re-studied the SRT and concluded that time for removing/re-installing multiple components (e.g., exhaust manifold/turbo, engine sensor harness, rocker arm assemblies, etc.) should not be included.
Techtalk80002021-01-03. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Tech Talk discussion on Cascadia Engine Brakes Not working.
Techtalk79812020-12-31. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on 2015 Cascadia dd13 no crank no start.
Techtalk68702020-12-31. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on P3 Coolant level sensor voltage fluctuating.
SB35-0362020-12-30. Service bulletin. POWER TRAIN. Revised Freightliner Service Bulletin for Axle Flange Gasket Replaced with O-Ring. Revision removed steps instructing removal and installation of wheels. Daimler Trucks North America has released a new axle shaft to hub rubber O-ring (part number 11-30728-000) as a replacement for the paper gasket (part number 11-14418-000). The new O-ring will provide better sealing and is reusable. It is quicker and easier to use compared to the paper gasket, because using a paper gasket requires cleaning the hub when the axle shaft is removed.
WP20-018R2020-12-12. Service bulletin. STEERING; POWER TRAIN. Revised Warranty Policy Letter for Alliance/Mascot Aftermarket Warranty and Claim Filing. Revisions are in blue. With Mascot now in partnership with Detroit Reman and Alliance Parts, DTNA is pleased to announce that Mascot coverage has been added to OWL. Remanufactured Alliance/Mascot parts include transmission, differential, steering gear, and steering pump used in an on-highway vehicle applications. The Alliance/Mascot aftermarket warranty coverage period has not changed: depending on the part, coverage is for one (1) or two (2) years and current parts, labor, and reimbursement policies apply.
WP20-0182020-12-12. Service bulletin. STEERING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; POWER TRAIN. Warranty Policy Letter for Alliance/Mascot Aftermarket Warranty and Claim Filing. With Mascot now in partnership with Detroit Reman and Alliance Parts, DTNA is pleased to announce that Mascot coverage has been added to OWL. Remanufactured Alliance/Mascot parts include transmission, differential, steering gear, and steering pump used in an on-highway vehicle applications. The Alliance/Mascot aftermarket warranty coverage period has not changed: depending on the part, coverage is for one (1) or two (2) years and current parts, labor, and reimbursement policies apply.
18SP7442020-12-08. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:FUEL RAIL. Special Publication letter for Two-Filter Fuel System KM59 GEN1 DD15 DD16 Severe Duty High Pressure Fuel Rail Feed Lines Service Kit.
SB26-0522020-12-07. Service bulletin. POWER TRAIN. Revised Service Bulletin for DT12 PTO Upfit. This bulletin replaces the version dated 09/13/2019. DDCSN and Power Service Literature references have been removed.
20TS-092020-12-07. Service bulletin. ENGINE AND ENGINE COOLING. Technical Service Letter for SPN 3711 FMI 31 on GHG17 DD15 Trucks.
TechTalk31212020-12-01. Service bulletin. VEHICLE SPEED CONTROL. Tech Talk discussion Cascadia cruise control inop after Detroit software update.
TechTalk73212020-11-04. Service bulletin. POWER TRAIN. Tech Talk discussion on DT-12 WILL NOT GO INTO GEAR.
TechTalk63742020-11-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE. Tech Talk discussion on a 2015 Cascadia that will not start after replacing APU batteries.
JOYSON LTR2020-11-01. Service bulletin. SEAT BELTS. Joyson Safety Systems letter informing DTNA about Hikone Webbing Investigation. JSS is near completion of an initial investigation regarding data integrity issues at the seatbelt webbing manufacturing facility in Hikone, Japan acquired from Takata in April of 2018.
SB54-2782020-10-28. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Updated Freightliner Service Bulletin for Powernet Troubleshooting Guide - Batteries, Path, Alternator, and Starter. This bulletin replaces the version dated 5/31/2017. Information is added about the BCT-460DTNA PowerNet Assessment Tool. When troubleshooting Powernet issues, use the BCT-460DTNA PowerNet Assessment Tool. As of May 29, 2018, the AutoMeter® is the only Daimler-approved tool for troubleshooting vehicle Powernet issues.
SB35-0362020-10-12. Service bulletin. EQUIPMENT; POWER TRAIN. Freightliner Service Bulletin for Axle Flange Gasket Replaced with O-Ring. Daimler Trucks North America has released a new axle shaft to hub rubber O-ring (part number 11-30728-000) as a replacement for the paper gasket (part number 11-14418-000). The new O-ring will provide better sealing and is reusable. It is quicker and easier to use compared to the paper gasket, because using a paper gasket requires cleaning the hub when the axle shaft is removed.
TechTalk76792020-10-01. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on repair verification for codes like 'low air flow' when a trailer is not available.
TechTalk47252020-09-30. Service bulletin. STEERING; EQUIPMENT. Tech Talk discussion about power steering fluid.
TechTalk20392020-09-25. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). Tech Talk Discussion for DD15 GHG14 EGR linkage hex nuts.
D20M92020-09-23. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. Detroit Diesel Field Service Campaign for Engine Emission Label Replacement. Certain DETROIT heavy-duty engines installed in various applications will require reprogramming and engine emission label replacement.
20CSA-152020-09-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT. Customer Service Announcement for Release of DiagnosticLink 8.12 Service Pack 2. On Thursday, September 3, 2020, Service Pack (SP) 2 for DiagnosticLink 8.12 Standard and Professional will be made available to download from the Detroit Diesel server.
SS10347612020-09-01. Service bulletin. ENGINE AND ENGINE COOLING. Service Solution for P3 - CEL On and Engine de-rate due to ATD Chassis Harness Circuit 532M5+ at DEF Heater Supply location is shorted. Harness part number A66-03217-002 has been reported experiencing failures due to damages to 532M5+ circuit shorting /or corrosion in terminals at Connector (23-13053-200) harness location "ATD_CHAS_F_O_HTR_LINE_DEF_5B" .
D20M62020-08-31. Service bulletin. ENGINE AND ENGINE COOLING. Detroit Diesel Field Service Campaign for DETROIT Reman Built HDEP Engines - Incorrect Gear Train Bolt Torque. The gear train mounting bolts need to be checked for proper torque and adjusted as needed.

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