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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

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
SB54-3082021-02-26. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; EQUIPMENT. Freightliner Service Bulletin for Programming Chassis Electronic Control Units (ECUs) With DiagnosticLink.
WI21-0062021-02-26. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Warranty Information Letter for Detroit NOx Sensor Circuit Fault Codes - Claim Guidelines.
21TS-032021-02-04. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Technical Service Letter for GHG17 1-Box Inlet and Outlet Exhaust Clamps. There is a short supply of exhaust clamps, part number DDE A6809950502, used as inlet and outlet exhaust clamps on GHG17 heavy duty engines (DD13, DD15 and DD16) with a 1-Box aftertreatment configuration. Exhaust clamp part number TCX T130158342AC2 may be used as a substitute for DDE A6809950502, but be aware of the different torque specs between the two parts.
TechTalk73092021-02-03. Service bulletin. ENGINE AND ENGINE COOLING. TechTalk discussion on Fault Code 520342-17.
TechTalk76442021-02-02. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on Possible new regen strategy on GHG 17.
SS10344922021-01-28. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Superseded Service Solution for New Cascadia P4 Coolant Level Wiring Damage. Fault codes can be generated if wiring to the coolant level sensor becomes damaged. This Service Solution has been superseded to service bulletin SB 54-337. Please see the service bulletin for the most current information.
21TS-012021-01-28. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Technical Service Letter for Detroit Bearing Failures - Standard Diagnostic Times. DTNA is increasing repair strategies for determining the root cause of Detroit DD heavy duty lower end bearing failures. To support this strategy change, Detroit now has two (2) Standard Diagnostic Times (SDTs), easy and difficult, which can be applied to repair orders.
WI21-0032021-01-28. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY. Warranty Information Letter for Detroit Bearing Failures - Standard Diagnostic Times. DTNA is increasing repair strategies for determining the root cause of Detroit DD heavy duty lower end bearing failures. To support this strategy change, Detroit now has two (2) Standard Diagnostic Times (SDTs), easy and difficult, which can be applied to repair orders.
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.
SB54-3372021-01-22. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Freightliner Service Bulletin for Coolant Level Sensor Wiring Repair. On New Cascadia vehicles, depending on the tension applied to the harness located at the coolant level sensor and its mounting locations, wiring damage can occur, resulting in one or more of the below listed fault codes.
Techtalk79942020-12-31. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. Tech Talk discussion on P3 Cascadia not able to install new CPC.
Techtalk79192020-12-31. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on DDEC reports.
Techtalk73092020-12-31. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk continued discussion on Fault Code 520342-17.
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.
20TS-092020-12-07. Service bulletin. ENGINE AND ENGINE COOLING. Technical Service Letter for SPN 3711 FMI 31 on GHG17 DD15 Trucks.
TechTalk78782020-12-04. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT; SERVICE BRAKES. Tech Talk discussion on service brakes lock up when using engine brakes.
TechTalk77362020-11-03. Service bulletin. ENGINE AND ENGINE COOLING. Tech talk discussion on DD13 throwing fan belts.
CALFTL60-0032020-10-19. Service bulletin. STRUCTURE; ENGINE AND ENGINE COOLING. Customer Advisory Letter for New Cascadia Cummins ISX12N Natural Gas Cab Mount Heat Shield Installation.
SB09-0382020-10-19. Service bulletin. ENGINE AND ENGINE COOLING. Freightliner Service Bulletin for Air Cleaner Support Bracket Bolt Replacement. On New Cascadia vehicles, the air filter housing rear mounting bracket bolts may be found to be loose or missing. If allowed to continue, this can lead to complete bolt failure which will allow the filter housing to rest on and possibly wear through the valve cover.
20TS-062020-10-13. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING. DDC Technical Service Letter for GHG17 DD Platform Heavy Duty Oil Pan Drain Plug Inserts. Some GHG17 DD Platform Heavy Duty oil pans may experience an issue with the oil pan drain plug insert spinning during removal or installation while completing an oil change. Leaking may also be observed at the drain plug and/or other plugs in the oil pan.
TechTalk76912020-10-02. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Tech Talk discussion about Common Powertrain Controller(CPC) not configured to Cascadia
18SP7362020-10-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS; ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. Detroit Diesel Special Publication informing about Heavy Duty Friction Style Belt Tensioner Kit. This heavy duty friction style belt tensioner kit contains the belt tensioner and two M10 bolts to correctly pin the friction style belt tensioner. The M10x80mm bolt is used to pin the engine cooling fan drive arm. The M10x50mm bolt is used to pin the engine accessory drive arm.
20TS-03REV22020-10-01. 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. The revision includes additional information on retrofit and service kits.
TechTalk77362020-10-01. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on DD13 keeps throwing belts.
TechTalk77092020-10-01. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ENGINE AND ENGINE COOLING. Tech talk discussion on inaccurate reading DEF gauge.

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