RAM 1500 2026 — technical service bulletin
Bulletin 08-303-25 · NHTSA communication 11023316 · issued Sep 16, 2025
Technical service bulletin
communication type
Electrical System
component
2026
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
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.