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Service bulletins for the 2018 Ram 3500

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.

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

By type

By component

By trouble code

By topic

Bulletins, newest first
08-049-202020-05-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Charging System, Battery Diagnostic Tools and Warranty This information only bulletin discusses using the correct test equipment for testing batteries and charging systems, and also warranty reimbursement when battery replacements are necessary.
18-039-202020-05-26. Service bulletin. FUEL SYSTEM, GASOLINE. Possible Driveability Issues due to the Winter-Blend Fuel into the Warmer Season
18-036-202020-05-26. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. This bulletin fixes all vehicles listed and also contains an optional software path for situations where the customer is specifically complaining of a drone noise, shudder, pulsation, or vibration under light throttle applications, while vehicle is operating in Multi Displacement System/Economics (MDS/ECO) mode (optionalsoftware available for D2&DJ vehicles).There will be two separate software options displayed on the wiTECH flash tab. The software file released for this condition contains the verbiage ?MDS NOISE?. The other file is the standard software that does not contain improvements for the drone/shudder concern. If for some reason the customer finds this shudder improvementobjectionable, the PCM software may be returned/reflashed to the standard version.Both software versions will address the remaining conditions noted in the bulletin.The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs):P3402 - Cylinder 1 Deactivation Control Performance. P3426 - Cylinder 4 Deactivation Control Performance. P3442 - Cylinder 6 Deactivation Control Performance. P3450 - Cylinder 7 Deactivation Control Performance. P0128 - Thermostat Rationality. Customers may also describe the following condition:Heater not warming cabin sufficiently and engine slow to warm up. This condition could be caused by a malfunctioning thermostat which is not associated with an HVAC issue.
D-19-02 Rev. D2020-05-26. Service bulletin. ELECTRICAL SYSTEM. Fast Feedback Program ? 6.7L Cummins Engine - 2019 & 2020 HD Ram & 6.7L Cummins Diesel Engine Control Module (ECM) - 2018 Ram ? All Models (Rev. D)
S18080001522020-05-26. Service bulletin. ELECTRICAL SYSTEM. CEL (Check Engine Lamp) Illuminates, Recent PCM Replace Or Flash Update Performed, DTC P057B Brake Pedal Position Sensor Circuit Performance
S20050000042020-05-26. Service bulletin. ELECTRICAL SYSTEM. C0020-01-ABS PUMP MOTOR CONTROL - GENERAL ELECTRICAL FAILURE
S20080000602020-05-26. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. Radio Issues With iPhone 11
S20080000592020-05-26. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. Error Code 20 Message On the Radio Screen
S20210000022020-05-26. Service bulletin. ELECTRICAL SYSTEM. Valve Body Pressure Testing Plug Inspection
S20190000022020-05-26. Service bulletin. STEERING. Hands On Steering Wheel Message In EVIC
90042512020-05-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. RFE Valvebody Plug Installation OEM RFE valve bodies require seven (7) 06030035 plugs installed and torqued to 45 in-lb (5Nm). Notify independant repair facilities when they order valve body.
90042462020-05-26. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. MODULE, Anti-Lock Brake System If ordering ECU PN 68347098AB or later to repair a C0020-01 ABS PUMP MOTOR CONTROL - GENERAL ELECTRICAL FAILURE, The HCU Hydraulic Control Unit can be replaced alone for this DTC. For any other DTC's follow published diagnostics.
S15080004802020-05-26. Service bulletin. VEHICLE SPEED CONTROL. Speed Control Operates Intermittently
S20080000242020-05-26. Service bulletin. BACK OVER PREVENTION: SENSING SYSTEM: CAMERA. Rear Cargo Camera Display Picture Is Distorted, Has Lines Going Through.
S20030000022020-05-26. Service bulletin. SUSPENSION. Chatter, Shudder, or Vibration From Rear Axle During Turns
S20230000142020-05-26. Service bulletin. VISIBILITY. Single Pop Noise From Rear Of Sunroof While Opening
S15080004802020-05-18. Service bulletin. VEHICLE SPEED CONTROL. Speed Control Operates Intermittently
S20080000242020-05-18. Service bulletin. BACK OVER PREVENTION. Rear Cargo Camera Display Picture Is Distorted, Has Lines Going Through.
S20030000022020-05-18. Service bulletin. SUSPENSION. Chatter, Shudder, or Vibration From Rear Axle During Turns
S20230000142020-05-18. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. Single Pop Noise From Rear Of Sunroof While Opening
S15080004802020-04-27. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Speed Control Operates Intermittently
S20080000242020-04-27. Service bulletin. BACK OVER PREVENTION: CAMERA SYSTEM. Rear Cargo Camera Display Picture Is Distorted, Has Lines Going Through.
S20030000022020-04-27. Service bulletin. SUSPENSION. Chatter, Shudder, or Vibration From Rear Axle During Turns
S20230000142020-04-27. Service bulletin. BACK OVER PREVENTION. Single Pop Noise From Rear Of Sunroof While Opening
S19180000032020-04-06. Service bulletin. ENGINE. Intermittent Engine Buck, Surge, or Misfire.

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