Technical Service Bulletin 08-323-25 REV. A — 2026 RAM 4500
ELECTRICAL SYSTEM
Bulletin Details
| TSB ID | 08-323-25 REV. A |
| Manufacturer | |
| Vehicle | 2026 RAM 4500 |
| Component | ELECTRICAL SYSTEM |
| Communication Date |
Bulletin Summary
Security Gateway Module (SGW) Software Update Customers may experience one or more of the following: ● SGW module is not responding to diagnostics and showing offline. ● If message for FOTA apprears, then a manual flash is required for SGW update. ● Diagnostic Trouble Code (DTC) U3033 - 00 Control module security certificate Missing/Invalid is active or stored and cannot clear. This DTC will not turn on the Malfunction Indicator Light (MIL).
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2026 RAM 4500
18-012-26 REV.A
ENGINE
18-012-26 REV.A
ELECTRICAL SYSTEM
18-012-26
ELECTRICAL SYSTEM
08-020-26
SERVICE BRAKES
18-002-26
POWER TRAIN
21-006-26
POWER TRAIN
S2523000088
ELECTRICAL SYSTEM
21-045-25
POWER TRAIN
108409
UNKNOWN OR OTHER
S2508000090
ELECTRICAL SYSTEM