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
| CALFTL31-003 | 2021-02-27. Service bulletin. TRAILER HITCHES; EQUIPMENT. Customer Advisory Letter for Cascadia, New Cascadia, and 122SD Vehicles with Cracked Fifth Wheel Angles |
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| SB54-308 | 2021-02-26. 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. |
| ICI21-003 | 2021-02-26. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Superseding Letter to an Important Campaign Information Letter to announce a reimbursement available to dealers for travel to a customer's location to perform a recall or field service campaign. Potential travel reimbursement applies to DTNA truck dealers and Detroit Diesel distributors. Thomas Built Buses will be addressed separately. This letter supersedes ICI20-022R. |
| WI21-006 | 2021-02-26. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Warranty Information Letter for Detroit NOx Sensor Circuit Fault Codes - Claim Guidelines. |
| WI20-014R | 2021-02-25. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Revised Warranty Information Letter for OWL and Warranty Manual Improvement: Sublets and Travel Time/Distance. In the spirit of continuous improvement, DTNA reviewed sublet-related policies and procedures. The goal was to improve language clarity and optimize processes. Revisions are in blue font. |
| 21TS-03 | 2021-02-04. 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. |
| TechTalk7309 | 2021-02-03. Service bulletin. ENGINE AND ENGINE COOLING. TechTalk discussion on Fault Code 520342-17. |
| TechTalk3285 | 2021-02-02. Service bulletin. LANE DEPARTURE; FORWARD COLLISION AVOIDANCE. Tech Talk discussion on Detroit Assurance Radar Picking Up Overhead Signs. |
| TechTalk7644 | 2021-02-02. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on Possible new regen strategy on GHG 17. |
| SS1034492 | 2021-01-28. 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-01 | 2021-01-28. 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. |
| WI21-003 | 2021-01-28. 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. |
| WI21-001 | 2021-01-26. 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. |
| SB54-342 | 2021-01-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Freightliner Service Bulletin for Rain/Light Sensor Removal. On New Cascadia vehicles, a delay in the timing of communication (hand shake) between the rain/light sensor (RLS) and sSAM generates fault code "33/521940/12 - rain/light sensor - general DTC timeout", which causes the sensor to stop working. |
| ICI21-002 | 2021-01-26. Service bulletin. EQUIPMENT. Important Campaign Information Letter for SF576 - Campaign Suspended. Due to parts availability it has been determined that this campaign will be suspended. A second Important Campaign Information letter will be posted when the campaign has been reactivated. |
| SB60-174 | 2021-01-22. Service bulletin. STRUCTURE. Freightliner Service Bulletin for Replacement Cab Doors with Pre-Drilled Holes. Replacement doors for New Cascadia vehicles are now pre-drilled with two holes for the installation of turning vanes. If turning vanes are not installed, the pre-drilled holes need to be plugged with ratchet fasteners. |
| SB54-337 | 2021-01-22. 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. |
| Techtalk7994 | 2020-12-31. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. Tech Talk discussion on P3 Cascadia not able to install new CPC. |
| Techtalk7929 | 2020-12-31. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Tech Talk discussion on p3 Cascadia overcharging. |
| Techtalk7919 | 2020-12-31. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on DDEC reports. |
| Techtalk7309 | 2020-12-31. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk continued discussion on Fault Code 520342-17. |
| Techtalk7228 | 2020-12-31. Service bulletin. POWER TRAIN. Tech Talk discussion on New Cascadia DT12 coming out of gear. |
| Techtalk6578 | 2020-12-31. Service bulletin. SERVICE BRAKES, AIR. Tech Talk discussion on New Cascadia "low air pressure" warning light. |
| Techtalk3425 | 2020-12-31. Service bulletin. EXTERIOR LIGHTING. Tech talk continuing discussion on P4 intermittent headlamps. |
| Techtalk3297 | 2020-12-31. Service bulletin. SERVICE BRAKES; WHEELS. Tech Talk discussion on New Cascadia P4 abs wheel speed sensor locations. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.