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Service bulletins for the 2020 Ram 4500

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.

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

By type

By component

By trouble code

Bulletins, newest first
S21080001692023-01-17. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Radio Display Abnormality
S17230000012023-01-17. Service bulletin. VISIBILITY. Left Hand Drivers Side Mirror Takes Longer to Defrost Or Clear Than Right Side Passenger
S21080001632023-01-17. Service bulletin. ELECTRICAL SYSTEM. No Start, Cannot Complete Module Replace, Proxi Or Module Proxi Configuration
S21090000042023-01-17. Service bulletin. ENGINE AND ENGINE COOLING. Issue involves overheating, running hot, coolant leaks and related symptoms after a Mopar replacement engine has been installed in the vehicle.
S21210000102023-01-17. Service bulletin. EQUIPMENT:ELECTRICAL; POWER TRAIN. Service 4WD Lamp On, 4WD System Does Not Work, 4WD Service Lamp Flashing, Front Axle Disconnect Does Not Engage Or Disengage
08072212023-01-17. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; ELECTRICAL SYSTEM. Flash: Driver Door Module (DDM) and Passenger Door Module (PDM) Updates This bulletin involves reprogramming the DDM and PDM with the latest available software. This software is for vehicles on the RRT VIN List is to improve the function and reliability of the power windows operation.
749122023-01-17. Service bulletin. FUEL SYSTEM, GASOLINE. Fast Feedback Program - 6.7L Cummins Engine - 2019 - 2022 HD Ram & Fuel Injection Pump - All Models (Rev. G)
S2108000127-12023-01-17. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Radio Reboot Continually
S21210000102023-01-17. Service bulletin. EQUIPMENT:ELECTRICAL. Service 4WD Lamp On, 4WD System Does Not Work, 4WD Service Lamp Flashing, Front Axle Disconnect Does Not Engage Or Disengage
S21080001272023-01-17. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Radio Reboot Continually
S21080001202023-01-17. Service bulletin. EQUIPMENT:ELECTRICAL. Radio Volume Uncontrollable Or Changing On Its Own
S20180000072023-01-17. Service bulletin. ENGINE AND ENGINE COOLING. Diagnostic Trouble Code (DTC) P0299 ? Turbocharger Underboost Additional Diagnostics
S21080000912023-01-17. Service bulletin. ELECTRICAL SYSTEM. When The PTO Is Engaged, Engine RPM Will Not Exceed 1100 RPM And The Engine Surges. Diagnostic Trouble Codes (DTCs) P061B ? Internal Control Module Torque Performance, And/Or P064B ? PTO Control Module, Set.
S21080000982023-01-17. Service bulletin. EQUIPMENT:APPLIANCE:TV/RADIO/SPEAKERS. Radio Screen Freeze, Blank Screen And Reset
S21210000092023-01-17. Service bulletin. POWER TRAIN. Rapid Shifts, High RPMs, 40-50 mph (65-80 kph) Max Speed, Inability to Perform Transmission Quick learn.
9004374-12023-01-17. Service bulletin. WHEELS. NUT, Wheel Flange Wheel Nut Service Torque should be 175 N-M.
90043742023-01-17. Service bulletin. WHEELS. NUT, Wheel Flange Wheel Nut Service Torque should be 190 N-M.
31-002-222023-01-17. Service bulletin. STRUCTURE. Aluminum Body Panel Corrosion Repair Aluminum corrosion or bubbling along the leading edge of hood, hinges or other exterior surface areas of the hinges, doors, fenders, swing gates or liftgates. NOTE: Digital imaging pre authorization is required for Smart Warranty Base dealers or Pre Approval is required from Regional Office depending on market. This bulletin involves inspecting and if necessary removing corrosion and refinishing the suspect aluminum panels on the vehicle, hood, door, fenders, hinges, swing gates or liftgate panels.
S22140000052023-01-17. Service bulletin. FUEL SYSTEM, GASOLINE:STORAGE:AUXILLARY TANK. Upgrading To A Larger Capacity Fuel Tanks
S22070000032023-01-17. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Suspected Internal Exhaust Gas Recirculation (EGR) Cooler Coolant Leak, Additional Diagnostics.
31001222023-01-09. Service bulletin. STRUCTURE. Approved Use of Weld Through Primers This bulletin documents the FCA US LLC position regarding the use of weld through primer when using Squeeze Type Resistance Spot Welding (STRSW) and Gas Metal Arc Welding (GMAW) processes when welding steel body panels and structural components.
855072023-01-09. Service bulletin. FUEL SYSTEM, GASOLINE. Warranty Bulletin D-19-02 Fast Feedback Program - 6.7L Cummins Engine & Fuel Injection Pump - 2019 - 2023 HD Ram ? All Models (Rev. J)
S2008000186REVA2023-01-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); ELECTRICAL SYSTEM. Engine Control Module (ECM) Flash Failure, Diagnostic Trouble Code (DTC) U1601 ? ECU Application Software Code 1 Missing Or Corrupted
S1923000015RevB2023-01-09. Service bulletin. POWER TRAIN. Transmission Column Shifter Lever Feels Loose
91000212023-01-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR. Seal, Crankshaft Oil, Rear,Retainer, Crankshaft Oil Seal US dealers only: If you are replacing the rear main seal due to an oil leak, do NOT remove the seal from the retainer. Replace the seal and retainer (pn# 05086755A$) as a complete unit. Engineering needs to obtain the seals and retainers back for analysis without them having been disassembled. Once repairs are complete, please contact FCA Redacted Content to return the parts.

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