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
| SB54-340 | 2020-12-12. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Service Bulletin for Pana-Pacific DEA505 Radio Reprogramming. On right-hand drive New Cascadia vehicles built before September 28, 2020, incompatible radio software can cause the Pana-Pacific DEA505 radios (A22-76228-000) to send the Bluetooth audio to the left-hand door speaker. |
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| WP20-018R | 2020-12-12. 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. |
| WP20-018 | 2020-12-12. 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. |
| 18SP744 | 2020-12-08. 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. |
| SB26-052 | 2020-12-07. 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-09 | 2020-12-07. Service bulletin. ENGINE AND ENGINE COOLING. Technical Service Letter for SPN 3711 FMI 31 on GHG17 DD15 Trucks. |
| TechTalk7850 | 2020-12-04. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Tech Talk discussion on P4 ACM Not Communicating. |
| TechTalk7194 | 2020-12-04. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Tech Talk discussion on DD15 making ticking noises. |
| TechTalk7905 | 2020-12-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; VISIBILITY. Tech Talk discussion on tractor, loses markers and wipers intermittently. |
| TechTalk7894 | 2020-12-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Tech talk discussion on ICC 5 loudspeaker faults. |
| TechTalk7888 | 2020-12-03. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on Low coolant sensor New Cascadia. |
| TechTalk7860 | 2020-12-02. Service bulletin. VISIBILITY; EQUIPMENT. Tech Talk discussion on P4 BPHS code 523450/11, PCU compressor-internal fault. |
| TechTalk7727 | 2020-12-02. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; VISIBILITY; ELECTRICAL SYSTEM; EQUIPMENT. Tech Talk discussion on P4 NEW CASCADIA AUX HVAC BLOWER TURN ON |
| TechTalk7065 | 2020-12-02. Service bulletin. VISIBILITY; ELECTRICAL SYSTEM. Tech Talk discussion on New Cascadia wipers unresponsive. Wipers don't work in the first two positions. Determined to be the LDW camera wire was caught underneath the top right portion of the windshield mounting plate, thus causing the rain/light sensor to not seat all the way against the windshield. |
| CALFTL54-014 | 2020-12-01. Service bulletin. ELECTRICAL SYSTEM. Customer Advisory Letter for Dome Lamps Do Not Illuminate When the Right-Hand Door is Opened. |
| DCFuelAnalytics | 2020-11-26. Service bulletin. FUEL SYSTEM, GASOLINE. Detroit Connect Customer Communication for vehicle trips not populating in the Vehicle History Trips page. This may affect Fleet Fuel Analysis and Fuel Economy Calculations. |
| D20M2 | 2020-11-04. Service bulletin. POWER TRAIN; EQUIPMENT; ENGINE AND ENGINE COOLING. Detroit Diesel Field Service Campaign for DETROIT TM2020 Transmission Replacement. It has been discovered that certain TM2020 units have porosity issues in and around the oil cooler line fittings on the center housing. |
| TechTalk7752 | 2020-11-03. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on fault codes SPN 1322 FMI 11 and SPN 1324 FMI 10 on engine cylinder misfires. |
| TechTalk7737 | 2020-11-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Tech Talk discussion on Diagnostic Link connection issues with D20M8. |
| TechTalk7758 | 2020-11-03. Service bulletin. ELECTRICAL SYSTEM. Tech Talk discussion for fuse 22 blowing. |
| TechTalk7786 | 2020-11-03. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; FORWARD COLLISION AVOIDANCE; LANE DEPARTURE. Tech Talk discussion on p4 gcw04t flashed to 19.45.1. Forward and lane camera not detected. |
| TechTalk7785 | 2020-11-03. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. Tech Talk discussion on DL8 CGW connection issues for D20M8. |
| TechTalk7762 | 2020-11-03. Service bulletin. VEHICLE SPEED CONTROL. Tech Talk discussion on Cruise Control Intermittently Dropping Out. |
| TechTalk7750 | 2020-11-03. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING. Tech Talk discussion on DETROIT D20M8 ASM DELETED. |
| TechTalk7735 | 2020-11-03. Service bulletin. FUEL SYSTEM, OTHER; ENGINE AND ENGINE COOLING. Tech Talk discussion on 1 Aftertreatment System Problem Detected. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.