RAM 1500 2025 — technical service bulletin
Bulletin 08-195-26 · NHTSA communication 11032320 · issued May 1, 2026
Technical service bulletin
communication type
Electrical System
component
2025
model years
1
vehicle entries
Official summary
Door Control Module (DCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● B2577-00 - Window Not Calibrated / Lost Calibration. Customers may experience one or more of the following: ● Power windows are inoperative and will not respond to switch inputs. ● Driver and passenger window auto up/down functions inoperative. *This bulletin involves inspecting and possibly reprogramming the DDM and PDM with the latest available software.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.