Jeep Gladiator 2020 — technical service bulletin
Bulletin 0803021 · NHTSA communication 10220937 · issued Mar 3, 2021
Technical service bulletin
communication type
Electrical System
component
2020
model years
1
vehicle entries
Official summary
Flash: Drivetrain Control Module (DTCM) Updates This bulletin involves reprogramming the DTCM with the latest available software. The customer may request to have the feature enabled which adds the ability to lock the rear axle differential, while 4-HI Off Road+ mode.
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.