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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

Only bulletins with component: Brakes are shown. Show all

Bulletins, newest first
90042552020-05-26. Service bulletin. PARKING BRAKE; ELECTRICAL SYSTEM. SWITCH, Ignition, Push Button (Keyless Ignition Node) Prior to replacing parts for a B1A7D-2A Diagnostic trouble code on heavy duty trucks.Please call FCA Redacted Content , please email a scan and config report to FCA Redacted Content. If no response in 15 minutes, proceed with repair.
90042452020-05-26. Service bulletin. ENGINE AND ENGINE COOLING; PARKING BRAKE. Gasket, Timing Gear Housing For 2019, and 2020 Model Year Only. If you are replacing the timing housing gasket due to an oil leak, please take detailed pictures of the leak, and submit them to the Star Center. Once submitted, continue with the repair. During the repair, check the breakaway torque of the gear housing retaining bolts. If any are found to be loose, note the location of the loose bolt(s) in the Star case.
23-012-20 REV. A2020-05-26. Service bulletin. AIR BAGS; PARKING BRAKE. Park Brake Pedal Doesn't Fully Return This bulletin involves inspecting and if necessary, replace the parking brake tensioner and then adjust the parking brake cable system. Customer may comment on one or more of the following:The parking brake foot pedal does not fully return. The red ?brake? light is illuminated in the Instrument Panel Cluster (IPC).
23-012-202020-05-26. Service bulletin. PARKING BRAKE. Park Brake Pedal Doesn't Fully Return This bulletin involves inspecting and if necessary, replace the parking brake tensioner and then adjust the parking brake cable system. Customer may comment on one or more of the following:The parking brake foot pedal does not fully return. The red ?brake? light is illuminated in the Instrument Panel Cluster (IPC).
23-012-20 REV. A2020-05-18. Service bulletin. SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES. Park Brake Pedal Doesn't Fully Return This bulletin involves inspecting and if necessary, replace the parking brake tensioner and then adjust the parking brake cable system. Customer may comment on one or more of the following:The parking brake foot pedal does not fully return. The red ?brake? light is illuminated in the Instrument Panel Cluster (IPC).
23-012-202020-05-18. Service bulletin. PARKING BRAKE. Park Brake Pedal Doesn't Fully Return This bulletin involves inspecting and if necessary, replace the parking brake tensioner and then adjust the parking brake cable system. Customer may comment on one or more of the following:The parking brake foot pedal does not fully return. The red ?brake? light is illuminated in the Instrument Panel Cluster (IPC).
23-012-20 REV. A2020-04-27. Service bulletin. PARKING BRAKE. Park Brake Pedal Doesn't Fully Return This bulletin involves inspecting and if necessary, replace the parking brake tensioner and then adjust the parking brake cable system. Customer may comment on one or more of the following:The parking brake foot pedal does not fully return. The red ?brake? light is illuminated in the Instrument Panel Cluster (IPC).
23-012-202020-04-27. Service bulletin. PARKING BRAKE. Park Brake Pedal Doesn't Fully Return This bulletin involves inspecting and if necessary, replace the parking brake tensioner and then adjust the parking brake cable system. Customer may comment on one or more of the following:The parking brake foot pedal does not fully return. The red ?brake? light is illuminated in the Instrument Panel Cluster (IPC).

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