WenmarOpen by Wenmar Pro

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

Only bulletins with component: Glass, wipers and mirrors are shown. Show all

Bulletins, newest first
S2008000182 Rev.2021-03-01. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY. Driver Or Passenger Power Windows Do Not Go Up Or Down
90043342021-03-01. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. Power Window Regulator or Motor Owners may complain that the Driver and or Passenger Windows are inoperative. Technician may find DTC?s B18BA-12 - Window Control - Circuit Short to Battery, B18BA-13 - Window Control - Circuit Open (stored or active). Replace the DDM or PDM per detailed repair information in Service Library or reference Star Online Publlication S2008000182. Replacing regulators or motors will not correct this issue.
90043422021-02-16. Service bulletin. VISIBILITY. WINDSHIELD Windshield cracked or blemish. When customer comes in for a cracked windshield, please note the location of crack and take pictures before repair. Please send pictures to FCA Redacted Content or load to the warranty claims system.
08-101-202020-12-28. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE; ELECTRICAL SYSTEM. Heating, Ventilation and Air Conditioning (HVAC) Controls Inoperative This bulletin involves replacing the HVAC module. Customers may experience not being able to change the HVAC modes, both on the radios display or HVAC controls.
08-072-202020-08-24. Service bulletin. VISIBILITY/WIPER; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Loose Wiper Arms This bulletin involves checking and or re-torquing the windshield wiper arm nuts. The customer may describe one or both of the windshield wiper arm are loose and may stop moving at times.
90042302020-05-18. Service bulletin. VISIBILITY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. LAMP, Center High Mounted Stop (CHMSL - Cargo lamp) For concern of water leak intrusion at CHMSL lamp: Before CHMSL lamp removal, please check for proper CHMSL installation. Verify that CHMSL harness is well hidden (not visible) into the cabin and not trapped between lamp and cabin. If harness is trapped, take a picture and verify seal foam also has a harness mark. Add this comment into narrative. Please call FCA Redacted Content prior to replacing the component (if needed). If no response in 15 minutes, proceed with repair.

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